Artigos de revistas: "Large image processing"

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Lee, Youngrim, Wanyong Park, Hyunchun Park e Daesik Shin. "FAST Design for Large-Scale Satellite Image Processing". Journal of the Korea Institute of Military Science and Technology 25, n.º 4 (5 de agosto de 2022): 372–80. http://dx.doi.org/10.9766/kimst.2022.25.4.372.

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This study proposes a distributed parallel processing system, called the Fast Analysis System for remote sensing daTa(FAST), for large-scale satellite image processing and analysis. FAST is a system that designs jobs in vertices and sequences, and distributes and processes them simultaneously. FAST manages data based on the Hadoop Distributed File System, controls entire jobs based on Apache Spark, and performs tasks in parallel in multiple slave nodes based on a docker container design. FAST enables the high-performance processing of progressively accumulated large-volume satellite images. Because the unit task is performed based on Docker, it is possible to reuse existing source codes for designing and implementing unit tasks. Additionally, the system is robust against software/hardware faults. To prove the capability of the proposed system, we performed an experiment to generate the original satellite images as ortho-images, which is a pre-processing step for all image analyses. In the experiment, when FAST was configured with eight slave nodes, it was found that the processing of a satellite image took less than 30 sec. Through these results, we proved the suitability and practical applicability of the FAST design.

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Pal, N. R., e J. C. Bezdek. "Complexity reduction for "large image" processing". IEEE Transactions on Systems, Man and Cybernetics, Part B (Cybernetics) 32, n.º 5 (outubro de 2002): 598–611. http://dx.doi.org/10.1109/tsmcb.2002.1033179.

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Khellah, F., P. Fieguth, M. J. Murray e M. Allen. "Statistical processing of large image sequences". IEEE Transactions on Image Processing 14, n.º 1 (janeiro de 2005): 80–93. http://dx.doi.org/10.1109/tip.2004.838703.

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Tripathi, Rakesh, e Neelesh Gupta. "A Review on Segmentation Techniques in Large-Scale Remote Sensing Images". SMART MOVES JOURNAL IJOSCIENCE 4, n.º 4 (20 de abril de 2018): 7. http://dx.doi.org/10.24113/ijoscience.v4i4.143.

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Information extraction is a very challenging task because remote sensing images are very complicated and can be influenced by many factors. The information we can derive from a remote sensing image mostly depends on the image segmentation results. Image segmentation is an important processing step in most image, video and computer vision applications. Extensive research has been done in creating many different approaches and algorithms for image segmentation. Labeling different parts of the image has been a challenging aspect of image processing. Segmentation is considered as one of the main steps in image processing. It divides a digital image into multiple regions in order to analyze them. It is also used to distinguish different objects in the image. Several image segmentation techniques have been developed by the researchers in order to make images smooth and easy to evaluate. Various algorithms for automating the segmentation process have been proposed, tested and evaluated to find the most ideal algorithm to be used for different types of images. In this paper a review of basic image segmentation techniques of satellite images is presented.

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Vinichuk, O. N., e V. I. Dravitsa. "Development of Algorithms for Processing Images of Large Volumes". Digital Transformation 28, n.º 2 (2 de setembro de 2022): 52–60. http://dx.doi.org/10.35596/2522-9613-2022-28-2-52-60.

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In recent years, interest in digital image processing has increased significantly, so it is no coincidence that digital processing is one of the intensively developed areas of research. When working with a computer system, a rather important factor is the high-quality display of images, as a result of which the methods of processing and improving images are no less important factors, which are not only responsible for the highquality display of the image, but also allow to increase the visibility of interesting details in the image. Today it is quite difficult to find an application or a web application with a simple and user-friendly interface, as well as with relatively low characteristics in terms of energy consumption needed to supply the operating system and the device in general. This article presents new algorithms that improve the efficiency of image processing by reducing application loading and processing time, as well as by reducing the load on the operating system.

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Liu, Zhi-Qiang. "Bayesian Paradigms in Image Processing". International Journal of Pattern Recognition and Artificial Intelligence 11, n.º 01 (fevereiro de 1997): 3–33. http://dx.doi.org/10.1142/s0218001497000020.

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A large number of image and spatial information processing problems involves the estimation of the intrinsic image information from observed images, for instance, image restoration, image registration, image partition, depth estimation, shape reconstruction and motion estimation. These are inverse problems and generally ill-posed. Such estimation problems can be readily formulated by Bayesian models which infer the desired image information from the measured data. Bayesian paradigms have played a very important role in spatial data analysis for over three decades and have found many successful applications. In this paper, we discuss several aspects of Bayesian paradigms: uncertainty present in the observed image, prior distribution modeling, Bayesian-based estimation techniques in image processing, particularly, the maximum a posteriori estimator and the Kalman filtering theory, robustness, and Markov random fields and applications.

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Shinde, Prof Dyanda. "Air Pollution Checker Using Image Processing". INTERANTIONAL JOURNAL OF SCIENTIFIC RESEARCH IN ENGINEERING AND MANAGEMENT 07, n.º 10 (1 de outubro de 2023): 1–11. http://dx.doi.org/10.55041/ijsrem26515.

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In this paper we present a new method to visualize air pollutant through image processing. In order to achieve a realistic effect, we further enhance thus above obtained images in spatial domain. In the proposed method we map the densities of air pollutants to different gray levels, and visualize them by blending those gray levels with background images. The proposed method can visualize large-scale air pollution data from different viewpoints in real time and provide the resulting image with any resolution theoretically, which is very important and favorable for the Internet transmission. Keywords: Machine Learning; Air Pollution; Air Pollution Prediction,images

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Dong, Lei, Tingtao Zhang, Fangjian Liu, Rui Liu e Hongjian You. "GPU Acceleration for SAR Satellite Image Ortho-Rectification". Remote Sensing 16, n.º 7 (7 de abril de 2024): 1301. http://dx.doi.org/10.3390/rs16071301.

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Synthetic Aperture Radar (SAR) satellite image ortho-rectification requires pixel-level calculations, which are time-consuming. Moreover, for SAR images with large overlapping areas, the processing time for ortho-rectification increases linearly, significantly reducing the efficiency of SAR satellite image mosaic. This paper thoroughly analyzes two geometric positioning models for SAR images. In order to address the high computation time of pixel-by-pixel ortho-rectification in SAR satellite images, a GPU-accelerated pixel-by-pixel correction method based on a rational polynomial coefficients (RPCs) model is proposed, which improves the efficiency of SAR satellite image ortho-rectification. Furthermore, in order to solve the problem of linearly increasing processing time for the ortho-rectification of multiple SAR images in large overlapping areas, a multi-GPU collaborative acceleration strategy for the ortho-rectification of multiple SAR images in large overlapping areas is proposed, achieving efficient ortho-rectification processing of multiple SAR image data in large overlapping areas. By conducting ortho-rectification experiments on 20 high-resolution SAR images from the Gaofen-3 satellite, the feasibility and efficiency of the multi-GPU collaborative acceleration processing algorithm are verified.

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Remondino, F., E. Nocerino, I. Toschi e F. Menna. "A CRITICAL REVIEW OF AUTOMATED PHOTOGRAMMETRIC PROCESSING OF LARGE DATASETS". ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLII-2/W5 (21 de agosto de 2017): 591–99. http://dx.doi.org/10.5194/isprs-archives-xlii-2-w5-591-2017.

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The paper reports some comparisons between commercial software able to automatically process image datasets for 3D reconstruction purposes. The main aspects investigated in the work are the capability to correctly orient large sets of image of complex environments, the metric quality of the results, replicability and redundancy. Different datasets are employed, each one featuring a diverse number of images, GSDs at cm and mm resolutions, and ground truth information to perform statistical analyses of the 3D results. A summary of (photogrammetric) terms is also provided, in order to provide rigorous terms of reference for comparisons and critical analyses.

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Kim, Yoon-Ki, e Yongsung Kim. "DiPLIP: Distributed Parallel Processing Platform for Stream Image Processing Based on Deep Learning Model Inference". Electronics 9, n.º 10 (13 de outubro de 2020): 1664. http://dx.doi.org/10.3390/electronics9101664.

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Recently, as the amount of real-time video streaming data has increased, distributed parallel processing systems have rapidly evolved to process large-scale data. In addition, with an increase in the scale of computing resources constituting the distributed parallel processing system, the orchestration of technology has become crucial for proper management of computing resources, in terms of allocating computing resources, setting up a programming environment, and deploying user applications. In this paper, we present a new distributed parallel processing platform for real-time large-scale image processing based on deep learning model inference, called DiPLIP. It provides a scheme for large-scale real-time image inference using buffer layer and a scalable parallel processing environment according to the size of the stream image. It allows users to easily process trained deep learning models for processing real-time images in a distributed parallel processing environment at high speeds, through the distribution of the virtual machine container.

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Wang, Chaoli, John P. Reese, Huan Zhang, Jun Tao, Yi Gu, Jun Ma e Robert J. Nemiroff. "Similarity-based visualization of large image collections". Information Visualization 14, n.º 3 (6 de agosto de 2013): 183–203. http://dx.doi.org/10.1177/1473871613498519.

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Effective techniques for organizing and visualizing large image collections are in growing demand as visual search gets increasingly popular. Targeting an online astronomy archive with thousands of images, we present our solution for image search and clustering based on the evaluation of image similarity using both visual and textual information. Time-consuming image similarity computation is accelerated using graphics processing unit. To lay out images, we introduce iMap, a treemap-based representation for visualizing and navigating image search and clustering results. iMap not only makes effective use of available display area to arrange images but also maintains stable update when images are inserted or removed during the query. We also develop an embedded visualization that integrates image tags for in-place search refinement. To show the effectiveness of our approach, we demonstrate experimental results, compare our iMap layout with a force-directed layout, and conduct a comparative user study. As a potential tool for astronomy education and outreach, we deploy our iMap to a large tiled display of nearly 50 million pixels.

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Piat, Sebastien, Nairi Usher, Simone Severini, Mark Herbster, Tommaso Mansi e Peter Mountney. "Image classification with quantum pre-training and auto-encoders". International Journal of Quantum Information 16, n.º 08 (dezembro de 2018): 1840009. http://dx.doi.org/10.1142/s0219749918400099.

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Computer vision has a wide range of applications from medical image analysis to robotics. Over the past few years, the field has been transformed by machine learning and stands to benefit from potential advances in quantum computing. The main challenge for processing images on current and near-term quantum devices is the size of the data such devices can process. Images can be large, multidimensional and have multiple color channels. Current machine learning approaches to computer vision that exploit quantum resources require a significant amount of manual pre-processing of the images in order to be able to fit them onto the device. This paper proposes a framework to address the problem of processing large scale data on small quantum devices. This framework does not require any dataset-specific processing or information and works on large, grayscale and RGB images. Furthermore, it is capable of scaling to larger quantum hardware architectures as they become available. In the proposed approach, a classical autoencoder is trained to compress the image data to a size that can be loaded onto a quantum device. Then, a Restricted Boltzmann Machine (RBM) is trained on the D-Wave device using the compressed data, and the weights from the RBM are then used to initialize a neural network for image classification. Results are demonstrated on two MNIST datasets and two medical imaging datasets.

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Nagy, Marius, e Naya Nagy. "Image processing: why quantum?" Quantum Information and Computation 20, n.º 7&8 (junho de 2020): 616–26. http://dx.doi.org/10.26421/qic20.7-8-6.

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Quantum Image Processing has exploded in recent years with dozens of papers trying to take advantage of quantum parallelism in order to offer a better alternative to how current computers are dealing with digital images. The vast majority of these papers define or make use of quantum representations based on very large superposition states spanning as many terms as there are pixels in the image they try to represent. While such a representation may apparently offer an advantage in terms of space (number of qubits used) and speed of processing (due to quantum parallelism), it also harbors a fundamental flaw: only one pixel can be recovered from the quantum representation of the entire image, and even that one is obtained non-deterministically through a measurement operation applied on the superposition state. We investigate in detail this measurement bottleneck problem by looking at the number of copies of the quantum representation that are necessary in order to recover various fractions of the original image. The results clearly show that any potential advantage a quantum representation might bring with respect to a classical one is paid for dearly with the huge amount of resources (space and time) required by a quantum approach to image processing.

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TAKAHASHI, Hiroshi, e Katsumi SANO. "Automatic Detection of Large Rocks by Image Processing." Shigen-to-Sozai 113, n.º 3 (1997): 169–74. http://dx.doi.org/10.2473/shigentosozai.113.169.

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Zhao, Qianqian. "Image Processing of Large-Scale Pollution on Water". Journal of Physics: Conference Series 1486 (abril de 2020): 042019. http://dx.doi.org/10.1088/1742-6596/1486/4/042019.

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Alles, Guilherme Rezende, João L. D. Comba, Jean-Marc Vincent, Shin Nagai e Lucas Mello Schnorr. "Measuring phenology uncertainty with large scale image processing". Ecological Informatics 59 (setembro de 2020): 101109. http://dx.doi.org/10.1016/j.ecoinf.2020.101109.

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Seshamani, Sharmishtaa, Camilo Laiton, Gabor Kovacs, Nicholas Lusk, Cameron Arshadi, Adam Glaser, Jayaram Chandrashekar e David Feng. "Cloud Pipelines for Large Scale Lightsheet Image Processing". Microscopy and Microanalysis 29, Supplement_1 (22 de julho de 2023): 998. http://dx.doi.org/10.1093/micmic/ozad067.501.

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Liang, Zheng, e Jian An Yuan. "Image Processing Technology for Aerial Camera Manipulator". Applied Mechanics and Materials 644-650 (setembro de 2014): 4072–75. http://dx.doi.org/10.4028/www.scientific.net/amm.644-650.4072.

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CCD aerial camera is one of the important means of obtaining the image information on the ground, it is through the collection, archiving, and reading to achieved the images acquisition. As the very large amounts of data of the images, it takes a lot of time far more than analysis and processing when archiving and reading, so that not only difficult achieve real-time detection and processing, but also causing a waste of storage space. Therefore, the research of image compression and other processing technology has become important particularly.This paper use the wavelet coding to get images compression for the problem, and design the image processing system of aerial camera manipulator. This system designed by embedded modular, and ARINC 429 bus to achieve communications between the camera and the aircraft systems, make compression to the images which captured by the camera, and deal with the compressed image as stored, local zoom in and out, etc.

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Gu, Yi, Chaoli Wang, Jun Ma, Robert J. Nemiroff, David L. Kao e Denis Parra. "Visualization and recommendation of large image collections toward effective sensemaking". Information Visualization 16, n.º 1 (25 de julho de 2016): 21–47. http://dx.doi.org/10.1177/1473871616630778.

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In our daily lives, images are among the most commonly found data which we need to handle. We present iGraph, a graph-based approach for visual analytics of large image collections and their associated text information. Given such a collection, we compute the similarity between images, the distance between texts, and the connection between image and text to construct iGraph, a compound graph representation which encodes the underlying relationships among these images and texts. To enable effective visual navigation and comprehension of iGraph with tens of thousands of nodes and hundreds of millions of edges, we present a progressive solution that offers collection overview, node comparison, and visual recommendation. Our solution not only allows users to explore the entire collection with representative images and keywords but also supports detailed comparison for understanding and intuitive guidance for navigation. The visual exploration of iGraph is further enhanced with the implementation of bubble sets to highlight group memberships of nodes, suggestion of abnormal keywords or time periods based on text outlier detection, and comparison of four different recommendation solutions. For performance speedup, multiple graphics processing units and central processing units are utilized for processing and visualization in parallel. We experiment with two image collections and leverage a cluster driving a display wall of nearly 50 million pixels. We show the effectiveness of our approach by demonstrating experimental results and conducting a user study.

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Mittleman, R. K., e N. W. Parker. "Micrograph image processing system". Proceedings, annual meeting, Electron Microscopy Society of America 44 (agosto de 1986): 872–73. http://dx.doi.org/10.1017/s0424820100145704.

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We have developed a computer-driven image processing system for the analysis of STEM micrographs. Modern computer and data storage devices give the researcher the ability to record and store large numbers of images. Our system was designed to allow rapid viewing and to facilitate the measurement process. Making use of an IBM 4381-2 mainframe computer and a high resolution (1024 x 1280 pixels) Metheus Omega 500 display system, we have written a flexible, interactive system to display and process data from our electron microscopes. The system is menu-driven from a mouse and can call subroutines from fortran, pascal or APL.APL is an interpreted, interactive language that is particularly well suited to real time image processing. Algebraic manipulations can be performed with equal ease on arrays of any rank and the user can affect many complex operations on dataarrays, usually with a single line of code (e.g., gray scale expansion, zoom, inner and outer product, etc.).

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Stoev, Stoicho. "Approaches in Using Python for Image Processing". Izvestia Journal of the Union of Scientists - Varna. Economic Sciences Series 12, n.º 3 (1 de dezembro de 2023): 122–28. http://dx.doi.org/10.56065/ijusv-ess/2023.12.3.122.

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Image processing is an increasingly widespread field in computer science. On the other hand, it is increasingly used both in modern business and in social communication. We will look at image manipulation methods, emphasizing approaches for comparing them. We will offer ways to process images included in popular specialized applications. We emphasize the use of the popular Python programming language, which is becoming more and more popular due to its ease of use and large range of tools. We will look at some of the image processing and analysis libraries used in Python.

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Long, Ma, Du Jiangbin, Zhao Jiayao, Wang Xuhao e Peng Yangfan. "Large-field Astronomical Image Restoration and Superresolution Reconstruction using Deep Learning". Publications of the Astronomical Society of the Pacific 135, n.º 1053 (1 de novembro de 2023): 114505. http://dx.doi.org/10.1088/1538-3873/ad0a04.

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Abstract The existing astronomical image restoration and superresolution reconstruction methods have problems such as low efficiency and poor results when dealing with images possessing large fields of view. Furthermore, these methods typically only handle fixed-size images and require step-by-step processing, which is inconvenient. In this paper, a neural network called Res&RecNet is proposed for the restoration and superresolution reconstruction of astronomical images with large fields of view for direct imaging instruments. This network performs feature extraction, feature correction, and progressive generation to achieve image restoration and superresolution reconstruction. The network is constructed using fully convolutional layers, allowing it to handle images of any size. The network can be trained using small samples and can perform image restoration and superresolution reconstruction in an end-to-end manner, resulting in high efficiency. Experimental results show that the network is highly effective in terms of processing astronomical images with complex scenes, generating image restoration results that improve the peak signal-to-noise ratio (PSNR) and structural similarity index measure (SSIM) by 4.69 (dB)/0.073 and superresolution reconstruction results that improve the PSNR and SSIM by 1.97 (dB)/0.077 over those of the best existing algorithms, respectively.

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Dong, Lei, Niangang Jiao, Tingtao Zhang, Fangjian Liu e Hongjian You. "GPU Accelerated Processing Method for Feature Point Extraction and Matching in Satellite SAR Images". Applied Sciences 14, n.º 4 (14 de fevereiro de 2024): 1528. http://dx.doi.org/10.3390/app14041528.

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This paper addresses the challenge of extracting feature points and image matching in Synthetic Aperture Radar (SAR) satellite images, particularly focusing on large-scale embedding. The widely used Scale Invariant Transform (SIFT) algorithm, successful in computer vision and optical satellite image matching, faces challenges when applied to satellite SAR images due to the presence of speckle noise, leading to increased matching errors. The SAR–SIFT method is explored and analyzed in-depth, considering the unique characteristics of satellite SAR images. To enhance the efficiency of matching identical feature points in two satellite SAR images, the paper proposes a Graphics Processing Unit (GPU) mapping implementation based on the SAR–SIFT algorithm. The paper introduces a multi-GPU collaborative acceleration strategy for SAR image matching. This strategy addresses the challenge of matching feature points in the region and embedding multiple SAR images in large areas. The goal is to achieve efficient matching processing of multiple SAR images in extensive geographical regions. The proposed multi-GPU collaborative acceleration algorithm is validated through experiments involving feature point extraction and matching using 21 GF-3 SAR images. The results demonstrate the feasibility and efficiency of the algorithm in enhancing the processing speed of matching feature points in large-scale satellite SAR images. Overall, the paper contributes to the advancement of SAR image processing techniques, specifically in feature point extraction and matching in large-scale applications.

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Liu, S., H. Li, X. Wang, L. Guo e R. Wang. "STUDY ON MOSAIC AND UNIFORM COLOR METHOD OF SATELLITE IMAGE FUSION IN LARGE SREA". ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLII-3 (30 de abril de 2018): 1099–102. http://dx.doi.org/10.5194/isprs-archives-xlii-3-1099-2018.

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Due to the improvement of satellite radiometric resolution and the color difference for multi-temporal satellite remote sensing images and the large amount of satellite image data, how to complete the mosaic and uniform color process of satellite images is always an important problem in image processing. First of all using the bundle uniform color method and least squares mosaic method of GXL and the dodging function, the uniform transition of color and brightness can be realized in large area and multi-temporal satellite images. Secondly, using Color Mapping software to color mosaic images of 16bit to mosaic images of 8bit based on uniform color method with low resolution reference images. At last, qualitative and quantitative analytical methods are used respectively to analyse and evaluate satellite image after mosaic and uniformity coloring. The test reflects the correlation of mosaic images before and after coloring is higher than 95&thinsp;% and image information entropy increases, texture features are enhanced which have been proved by calculation of quantitative indexes such as correlation coefficient and information entropy. Satellite image mosaic and color processing in large area has been well implemented.

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Sindhu, Sindhu, e V. Vaidhehi. "Classification of Human Organ Using Image Processing". Oriental journal of computer science and technology 10, n.º 2 (11 de abril de 2017): 333–37. http://dx.doi.org/10.13005/ojcst/10.02.11.

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The collection of large database of digital image has been used for efficient and advanced way for classifying and intelligent retrieval of medical imaging. This research work is to classify human organs based on MRI images. The various MRI images of organ have been considered as the data set. The main objective of this research work is to automate the medical imaging system. Digital images retrieved based on its shape by Canny Edge Detection and is clustered together in one class using K-Means Algorithm. 2564 data sets related to brain and heart is considered for this research work. The system was trained to classify the image which results in faster execution in medical field, also helped in obtain noiseless and efficient data.

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Swarajya Lakshmi, B. "Fire Detection Using Image Processing". Asian Journal of Computer Science and Technology 10, n.º 2 (5 de novembro de 2021): 14–19. http://dx.doi.org/10.51983/ajcst-2021.10.2.2883.

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Fire disasters have always been a threat to homes and businesses even with the various systems in place to prevent them. They cause property damage, injuries and even death. Preparedness is vital when dealing with fires. They spread uncontrollably and are difficult to contain. To contain them it is necessary for the fire to be detected early. Image fire detection heavily relies on an algorithmic analysis of images. However, the accuracy is lower, the detection is delayed and in common detection algorithms a large number of computation, including the image features being extracted manually and using machine. Therefore, in this paper, novel image detection which will be based on the advanced object detection like CNN model of YOLO v3 is proposed. The average precision of the algorithm based on YOLO v3 reaches to 81.76% and also it has the stronger robustness of detection performance, thereby satisfying the requirements of the real-time detection.

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Bhatta, Janardan. "Large-scale image search with text for information retrieval". Journal of Innovations in Engineering Education 4, n.º 1 (5 de março de 2021): 87–89. http://dx.doi.org/10.3126/jiee.v4i1.35390.

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Searching images in a large database is a major requirement in Information Retrieval Systems. Expecting image search results based on a text query is a challenging task. In this paper, we leverage the power of Computer Vision and Natural Language Processing in Distributed Machines to lower the latency of search results. Image pixel features are computed based on contrastive loss function for image search. Text features are computed based on the Attention Mechanism for text search. These features are aligned together preserving the information in each text and image feature. Previously, the approach was tested only in multilingual models. However, we have tested it in image-text dataset and it enabled us to search in any form of text or images with high accuracy.

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Mirwansyah, Dedy, e Arief Wibowo. "FRUIT IMAGE CLASSIFICATION USING DEEP LEARNING ALGORITHM: SYSTEMATIC LITERATURE REVIEW (SLR)". MULTICA SCIENCE AND TECHNOLOGY (MST) JOURNAL 2, n.º 2 (31 de outubro de 2022): 120–23. http://dx.doi.org/10.47002/mst.v2i2.356.

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Systematic literature review (SLR) research studies various classification models with deep learning algorithms on fruit with digital images. In recent years, computer vision and processing techniques are increasingly useful in the fruit industry, especially for quality and color inspection, sizing, and shape sorting applications. Research in this area demonstrates the feasibility of using a machine computer vision system to improve product quality. Utilizing deep learning in the field of image processing or digital image processing, Image Processing is used to assist humans in recognizing and/or classifying objects quickly, and precisely, and can process large amounts of data simultaneously. Classifying fruit through a computerized system using deep learning algorithms with CNN, MASK-RCNN, FASTER-RCNN, and SSD models. Developed on the multilayer perceptron (MLP) layer, the algorithm is processed into two-dimensional data, to the image and is capable of classifying images with larger classes.

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Sun, Bing, Chuying Fang, Hailun Xu e Anqi Gao. "A New Synthetic Aperture Radar (SAR) Imaging Method Combining Match Filter Imaging and Image Edge Enhancement". Sensors 18, n.º 12 (26 de novembro de 2018): 4133. http://dx.doi.org/10.3390/s18124133.

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In general, synthetic aperture radar (SAR) imaging and image processing are two sequential steps in SAR image processing. Due to the large size of SAR images, most image processing algorithms require image segmentation before processing. However, the existence of speckle noise in SAR images, as well as poor contrast and the uneven distribution of gray values in the same target, make SAR images difficult to segment. In order to facilitate the subsequent processing of SAR images, this paper proposes a new method that combines the back-projection algorithm (BPA) and a first-order gradient operator to enhance the edges of SAR images to overcome image segmentation problems. For complex-valued signals, the gradient operator was applied directly to the imaging process. The experimental results of simulated images and real images validate our proposed method. For the simulated scene, the supervised image segmentation evaluation indexes of our method have more than 1.18%, 11.2% and 11.72% improvement on probabilistic Rand index (PRI), variability index (VI), and global consistency error (GCE). The proposed imaging method will make SAR image segmentation and related applications easier.

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Filiberti, Daniel P., Paolo Bellutta, Phillip Ngan e Douglas A. Perednia. "Efficient segmentation of large-area skin images: an overview of image processing". Skin Research and Technology 1, n.º 4 (novembro de 1995): 200–208. http://dx.doi.org/10.1111/j.1600-0846.1995.tb00044.x.

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Zhang, H., Y. Yang e D. Wang. "MULTIMODE SATELLITE IMAGE HYBRID BLOCK-ADJUSTMENT AND ITS APPLICATION IN LARGE AREA ORTHOPHOTO IMAGE PROCESSING". International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLIII-B2-2022 (30 de maio de 2022): 107–12. http://dx.doi.org/10.5194/isprs-archives-xliii-b2-2022-107-2022.

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Abstract. Different satellite images have different positioning accuracy. For example, stereo satellite images have higher positioning accuracy than resource survey satellite images. In addition, for a large number of non stereo satellite images, due to the inability to build a strong triangulation model, it is impossible to carry out block adjustment alone to improve the image positioning accuracy. High precision and high resolution Orthophoto Images are the basis of resource investigation and monitoring and basic geographic information updating. For example, China's third national land survey, national geographic situation monitoring and other national projects require that the survey base map must reach the accuracy of 1:10000 scale, that is, the mean square plane error of points is less than 5m. For most satellite images, a certain number of ground control points need to be deployed to achieve this accuracy. Due to the difficulty of obtaining high-precision ground control points and DEM data in difficult areas, high-precision mapping has always been an unsolved problem, such as Western China. In addition, due to the limited coverage of a single satellite image, to realize the complete coverage of an image in a large area requires the joint application of multiple satellite images. In this paper, the high-precision collaborative geometric processing model and technical method of high-resolution multi-source remote sensing satellite images are proposed. The high-precision collaborative geometric processing of more than ten kinds of high-resolution domestic satellite images is completed by integrating multi-source observation data. An automatic construction method of large-scale block adjustment model of remote sensing images from domestic satellites based on multivariate generalized control network is proposed, including key technologies such as automatic optimization of optimal tie points under different modes, automatic matching of multi-node parallelization tie points, multi-level gross error elimination and so on, which realizes the automatic and stable construction of aerial triangulation model. The test shows that the positioning accuracy of satellite images is better than the accuracy requirements of 1:10000 scale without ground control points, which solves the problem of geometric positioning of 1:10000 scale accuracy in areas where it is difficult to obtain ground control points in the field of Western China.

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Liu, Xian Li, Xiao Ran Song, L. J. Liu, Zhong Yang Zhao e D. L. Ma. "Large NC Machining Fast Knife Mould Based on Image Technology". Advanced Materials Research 188 (março de 2011): 613–16. http://dx.doi.org/10.4028/www.scientific.net/amr.188.613.

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In NC machining large moulds, second mold will install deviated orientation problem. Based on image technology, after the second for installation of workpiece, collected clip in the concrete pins on measuring and calculating the image processing, analysis, and finally got the localization generated during installation and adjustment, the deviation of the machine to eliminate biases. In image processing of PSCP thinning algorithm, based on the characteristics of image edge detection were analyzed, the extraction and processing, improve the machining accuracy and efficiency. This method can also be used in small parts processing detection, etc.

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Li, Weijia, Conghui He, Haohuan Fu, Juepeng Zheng, Runmin Dong, Maocai Xia, Le Yu e Wayne Luk. "A Real-Time Tree Crown Detection Approach for Large-Scale Remote Sensing Images on FPGAs". Remote Sensing 11, n.º 9 (30 de abril de 2019): 1025. http://dx.doi.org/10.3390/rs11091025.

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The on-board real-time tree crown detection from high-resolution remote sensing images is beneficial for avoiding the delay between data acquisition and processing, reducing the quantity of data transmission from the satellite to the ground, monitoring the growing condition of individual trees, and discovering the damage of trees as early as possible, etc. Existing high performance platform based tree crown detection studies either focus on processing images in a small size or suffer from high power consumption or slow processing speed. In this paper, we propose the first FPGA-based real-time tree crown detection approach for large-scale satellite images. A pipelined-friendly and resource-economic tree crown detection algorithm (PF-TCD) is designed through reconstructing and modifying the workflow of the original algorithm into three computational kernels on FPGAs. Compared with the well-optimized software implementation of the original algorithm on an Intel 12-core CPU, our proposed PF-TCD obtains the speedup of 18.75 times for a satellite image with a size of 12,188 × 12,576 pixels without reducing the detection accuracy. The image processing time for the large-scale remote sensing image is only 0.33 s, which satisfies the requirements of the on-board real-time data processing on satellites.

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Yang, Li Juan, Pei Huang Lou e Xiao Ming Qian. "Recognition of initial welding position for large diameter pipeline based on pulse coupled neural network". Industrial Robot: An International Journal 42, n.º 4 (15 de junho de 2015): 339–46. http://dx.doi.org/10.1108/ir-01-2015-0011.

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Purpose – The main purpose of this paper is to develop a method to recognize the initial welding position for large-diameter pipeline automatically, and introduce the image processing based on pulse-coupled neural network (PCNN) which is adopted by the proposed method. Design/methodology/approach – In this paper, a passive vision sensor is designed to capture weld seam images in real time. The proposed method contains two steps. The first step is to detect the rough position of the weld seam, and the second step is to recognize one of the solder joints from the local image and extract its centroid, which is regarded as the initial welding position. In each step, image segmentation and removal of small false regions based on PCNN are adopted to obtain the object regions; then, the traditional image processing theory is used for the subsequent processing. Findings – The experimental results show the feasibility and real time of the proposed method. Based on vision sensing technology and PCNN, it is able to achieve the autonomous recognition of initial welding position in large-diameter pipeline welding. Practical implications – The proposed method can greatly shorten the time of positioning the initial welding position and satisfy the automatic welding for large-diameter pipeline. Originality/value – In the proposed method, the image pre-processing is based on PCNN, which is more robust and flexible in the complex welding environment. After that, traditional image processing theory is adopted for the subsequent processing, of which the processing speed is faster.

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Chien, S. A., e H. B. Mortensen. "Automating image processing for scientific data analysis of a large image database". IEEE Transactions on Pattern Analysis and Machine Intelligence 18, n.º 8 (1996): 854–59. http://dx.doi.org/10.1109/34.531806.

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Tosi, Sébastien, Lídia Bardia, Maria Jose Filgueira, Alexandre Calon e Julien Colombelli. "LOBSTER: an environment to design bioimage analysis workflows for large and complex fluorescence microscopy data". Bioinformatics 36, n.º 8 (20 de dezembro de 2019): 2634–35. http://dx.doi.org/10.1093/bioinformatics/btz945.

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Abstract Summary Open source software such as ImageJ and CellProfiler greatly simplified the quantitative analysis of microscopy images but their applicability is limited by the size, dimensionality and complexity of the images under study. In contrast, software optimized for the needs of specific research projects can overcome these limitations, but they may be harder to find, set up and customize to different needs. Overall, the analysis of large, complex, microscopy images is hence still a critical bottleneck for many Life Scientists. We introduce LOBSTER (Little Objects Segmentation and Tracking Environment), an environment designed to help scientists design and customize image analysis workflows to accurately characterize biological objects from a broad range of fluorescence microscopy images, including large images exceeding workstation main memory. LOBSTER comes with a starting set of over 75 sample image analysis workflows and associated images stemming from state-of-the-art image-based research projects. Availability and implementation LOBSTER requires MATLAB (version ≥ 2015a), MATLAB Image processing toolbox, and MATLAB statistics and machine learning toolbox. Code source, online tutorials, video demonstrations, documentation and sample images are freely available from: https://sebastients.github.io. Supplementary information Supplementary data are available at Bioinformatics online.

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Munglani, Gautam, Hannes Vogler e Ueli Grossniklaus. "Fast and flexible processing of large FRET image stacks using the FRET-IBRA toolkit". PLOS Computational Biology 18, n.º 4 (4 de abril de 2022): e1009242. http://dx.doi.org/10.1371/journal.pcbi.1009242.

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Ratiometric time-lapse FRET analysis requires a robust and accurate processing pipeline to eliminate bias in intensity measurements on fluorescent images before further quantitative analysis can be conducted. This level of robustness can only be achieved by supplementing automated tools with built-in flexibility for manual ad-hoc adjustments. FRET-IBRA is a modular and fully parallelized configuration file-based tool written in Python. It simplifies the FRET processing pipeline to achieve accurate, registered, and unified ratio image stacks. The flexibility of this tool to handle discontinuous image frame sequences with tailored configuration parameters further streamlines the processing of outliers and time-varying effects in the original microscopy images. FRET-IBRA offers cluster-based channel background subtraction, photobleaching correction, and ratio image construction in an all-in-one solution without the need for multiple applications, image format conversions, and/or plug-ins. The package accepts a variety of input formats and outputs TIFF image stacks along with performance measures to detect both the quality and failure of the background subtraction algorithm on a per frame basis. Furthermore, FRET-IBRA outputs images with superior signal-to-noise ratio and accuracy in comparison to existing background subtraction solutions, whilst maintaining a fast runtime. We have used the FRET-IBRA package extensively to quantify the spatial distribution of calcium ions during pollen tube growth under mechanical constraints. Benchmarks against existing tools clearly demonstrate the need for FRET-IBRA in extracting reliable insights from FRET microscopy images of dynamic physiological processes at high spatial and temporal resolution. The source code for Linux and Mac operating systems is released under the BSD license and, along with installation instructions, test images, example configuration files, and a step-by-step tutorial, is freely available at github.com/gmunglani/fret-ibra.

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BALAJI, Dr A., KOTA DEEPAK VENKATESH, SHAIK MOHAMMAD ANWAR, SHAIK SHABANA e MANGAMURI VENKATA MOHAN. "AN EFFICIENT IMAGE PROCESSING BASED IMAGE TO CARTOON GENERATION BASED ON DEEP LEARNING". Turkish Journal of Computer and Mathematics Education (TURCOMAT) 15, n.º 1 (4 de março de 2024): 86–90. http://dx.doi.org/10.61841/turcomat.v15i1.14544.

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This paper proposes an approach to convert real life images into cartoon images using image processing. The cartoon images have sharp edges, reduced colour quantity compared to the original image, and smooth colour regions. With the rapid advancement in artificial intelligence, recently deep learning methods have been developed for image to cartoon generation. Most of these methods perform extremely huge computations and require large datasets and are time consuming, unlike traditional image processing which involves direct manipulation on the input images. In this paper, we have developed an image processing based method for image to cartoon generation. Here, we perform parallel operations of enhancing the edges and quantizing the colour. The edges are extracted and dilated to highlight them in the output colour image. For colour quantization, the colours are assigned based on proposed formulation on separate colour channels. Later, these images are combined and the highlighted edges are added to generate the cartoon image. The generated images are compared with existing image processing approaches and deep learning based methods. From the experimental results, it is evident that the proposed approach generates high quality cartoon images which are visually appealing, have superior contrast and are able to preserve the contextual information at lower computational cost.

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Liu, Qi, Yu Lan Wei, Bing Li, Meng Dan Jin e Ying Ying Fan. "Detection Devices and Technologies on Large-Scale Pipe Weld Surface Defect". Advanced Materials Research 580 (outubro de 2012): 445–48. http://dx.doi.org/10.4028/www.scientific.net/amr.580.445.

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The kind and extent of defect can be identified through image processing. First, the weld defect detection device should be constructed, and then the defect imaged should be obtained through rational way, in order to enhance the image quality, image filter and image enhancement method should be use. To ensure the real-time system, the weld region need to segment from the image. After that, the needed defect features need to determine and extract. Finally, the kind, the location and the size of the defect can be defined.

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Khalaf, Walaa, Abeer Al Gburi e Dhafer Zaghar. "Pre and Postprocessing for JPEG to Handle Large Monochrome Images". Algorithms 12, n.º 12 (1 de dezembro de 2019): 255. http://dx.doi.org/10.3390/a12120255.

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Image compression is one of the most important fields of image processing. Because of the rapid development of image acquisition which will increase the image size, and in turn requires bigger storage space. JPEG has been considered as the most famous and applicable algorithm for image compression; however, it has shortfalls for some image types. Hence, new techniques are required to improve the quality of reconstructed images as well as to increase the compression ratio. The work in this paper introduces a scheme to enhance the JPEG algorithm. The proposed scheme is a new method which shrinks and stretches images using a smooth filter. In order to remove the blurring artifact which would be developed from shrinking and stretching the image, a hyperbolic function (tanh) is used to enhance the quality of the reconstructed image. Furthermore, the new approach achieves higher compression ratio for the same image quality, and/or better image quality for the same compression ratio than ordinary JPEG with respect to large size and more complex content images. However, it is an application for optimization to enhance the quality (PSNR and SSIM), of the reconstructed image and to reduce the size of the compressed image, especially for large size images.

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Roy Frieden, B. "Information and estimation in image processing". Proceedings, annual meeting, Electron Microscopy Society of America 45 (agosto de 1987): 14–17. http://dx.doi.org/10.1017/s0424820100125142.

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Despite the skill and determination of electro-optical system designers, the images acquired using their best designs often suffer from blur and noise. The aim of an “image enhancer” such as myself is to improve these poor images, usually by digital means, such that they better resemble the true, “optical object,” input to the system. This problem is notoriously “ill-posed,” i.e. any direct approach at inversion of the image data suffers strongly from the presence of even a small amount of noise in the data. In fact, the fluctuations engendered in neighboring output values tend to be strongly negative-correlated, so that the output spatially oscillates up and down, with large amplitude, about the true object. What can be done about this situation? As we shall see, various concepts taken from statistical communication theory have proven to be of real use in attacking this problem. We offer below a brief summary of these concepts.

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Mader, S., e G. J. Grenzdörffer. "AUTOMATIC SEA BIRD DETECTION FROM HIGH RESOLUTION AERIAL IMAGERY". ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLI-B7 (21 de junho de 2016): 299–303. http://dx.doi.org/10.5194/isprs-archives-xli-b7-299-2016.

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Great efforts are presently taken in the scientific community to develop computerized and (fully) automated image processing methods allowing for an efficient and automatic monitoring of sea birds and marine mammals in ever-growing amounts of aerial imagery. Currently the major part of the processing, however, is still conducted by especially trained professionals, visually examining the images and detecting and classifying the requested subjects. This is a very tedious task, particularly when the rate of void images regularly exceeds the mark of 90%. In the content of this contribution we will present our work aiming to support the processing of aerial images by modern methods from the field of image processing. We will especially focus on the combination of local, region-based feature detection and piecewise global image segmentation for automatic detection of different sea bird species. Large image dimensions resulting from the use of medium and large-format digital cameras in aerial surveys inhibit the applicability of image processing methods based on global operations. In order to efficiently handle those image sizes and to nevertheless take advantage of globally operating segmentation algorithms, we will describe the combined usage of a simple performant feature detector based on local operations on the original image with a complex global segmentation algorithm operating on extracted sub-images. The resulting exact segmentation of possible candidates then serves as a basis for the determination of feature vectors for subsequent elimination of false candidates and for classification tasks.

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Mader, S., e G. J. Grenzdörffer. "AUTOMATIC SEA BIRD DETECTION FROM HIGH RESOLUTION AERIAL IMAGERY". ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLI-B7 (21 de junho de 2016): 299–303. http://dx.doi.org/10.5194/isprsarchives-xli-b7-299-2016.

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Great efforts are presently taken in the scientific community to develop computerized and (fully) automated image processing methods allowing for an efficient and automatic monitoring of sea birds and marine mammals in ever-growing amounts of aerial imagery. Currently the major part of the processing, however, is still conducted by especially trained professionals, visually examining the images and detecting and classifying the requested subjects. This is a very tedious task, particularly when the rate of void images regularly exceeds the mark of 90%. In the content of this contribution we will present our work aiming to support the processing of aerial images by modern methods from the field of image processing. We will especially focus on the combination of local, region-based feature detection and piecewise global image segmentation for automatic detection of different sea bird species. Large image dimensions resulting from the use of medium and large-format digital cameras in aerial surveys inhibit the applicability of image processing methods based on global operations. In order to efficiently handle those image sizes and to nevertheless take advantage of globally operating segmentation algorithms, we will describe the combined usage of a simple performant feature detector based on local operations on the original image with a complex global segmentation algorithm operating on extracted sub-images. The resulting exact segmentation of possible candidates then serves as a basis for the determination of feature vectors for subsequent elimination of false candidates and for classification tasks.

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Zhang, Guanghua, Rongsheng Cui, Kai Qi e Bingqi Wang. "Research on Large Space Fire Monitoring Based on Image Processing". Journal of Physics: Conference Series 2074, n.º 1 (1 de novembro de 2021): 012003. http://dx.doi.org/10.1088/1742-6596/2074/1/012003.

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Abstract Fire in large space buildings has the characteristics of rapid spread and easy to ignite, which makes it difficult to extinguish fire. Therefore, the research on fire safety prevention technology of large space buildings has strong practical significance and practical value. Fire image automatic monitoring technology is based on the advantages of image processing and the high-speed operation of computer language. This paper proposes a fire monitoring technology which uses the information of flame image to analyze and judge fire. It combines computer graphics, digital image processing and computer vision technology, and one new image-based fire detection and processing technology is studied from the aspects of flame morphology and flame color.

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Dhanda, A., F. Remondino e M. Santana Quintero. "A METADATA BASED APPROACH FOR ANALYZING UAV DATASETS FOR PHOTOGRAMMETRIC APPLICATIONS". ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLII-2 (30 de maio de 2018): 297–302. http://dx.doi.org/10.5194/isprs-archives-xlii-2-297-2018.

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This paper proposes a methodology for pre-processing and analysing Unmanned Aerial Vehicle (UAV) datasets before photogrammetric processing. In cases where images are gathered without a detailed flight plan and at regular acquisition intervals the datasets can be quite large and be time consuming to process. This paper proposes a method to calculate the image overlap and filter out images to reduce large block sizes and speed up photogrammetric processing. The python-based algorithm that implements this methodology leverages the metadata in each image to determine the end and side overlap of grid-based UAV flights. Utilizing user input, the algorithm filters out images that are unneeded for photogrammetric processing. The result is an algorithm that can speed up photogrammetric processing and provide valuable information to the user about the flight path.

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Shimonomura, Kazuhiro, Seiji Kameda, Kazuo Ishii e Tetsuya Yagi. "A Novel Robot Vision Employing a Silicon Retina". Journal of Robotics and Mechatronics 13, n.º 6 (20 de dezembro de 2001): 614–20. http://dx.doi.org/10.20965/jrm.2001.p0614.

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A Robot vision system was designed using a silicon retina, which has been developed to mimick the parallel circuit structure of the vertebrate retina. The silicon retina used here is an analog CMOS very large-scale integrated circuit, which executes Laplacian-Gaussian like filtering on the image in real time. The processing is robust to change of illumination condition. Analog circuit modules were designed to detect the contour from the output image of the silicon retina and to binarize the output image. The images processed by the silicon retina as well as those by the analog circuit modules are received by the DOS/V-compatible mother-board with NTSC signal, which enables higher level processings using digital image processing techniques. This novel robot vision system can achieve real time and robust processings in natural illumination condition with a compact hardware and a low power consumption.

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Koh, Youngsol, e Yung-Hsiang Lu. "Large-scale Image Processing using Amazon EC2 Spot Instances". Electronic Imaging 2016, n.º 13 (14 de fevereiro de 2016): 1–6. http://dx.doi.org/10.2352/issn.2470-1173.2016.13.iqsp-226.

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Pietzsch, Tobias, Stephan Saalfeld, Stephan Preibisch e Pavel Tomancak. "BigDataViewer: visualization and processing for large image data sets". Nature Methods 12, n.º 6 (28 de maio de 2015): 481–83. http://dx.doi.org/10.1038/nmeth.3392.

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Li, Can, Miao Hu, Yunning Li, Hao Jiang, Ning Ge, Eric Montgomery, Jiaming Zhang et al. "Analogue signal and image processing with large memristor crossbars". Nature Electronics 1, n.º 1 (4 de dezembro de 2017): 52–59. http://dx.doi.org/10.1038/s41928-017-0002-z.

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Bright, David S. "Architecture/environments for image processing: Hardware and software for the microscopist". Proceedings, annual meeting, Electron Microscopy Society of America 51 (1 de agosto de 1993): 538–39. http://dx.doi.org/10.1017/s0424820100148526.

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Digital images are large arrays of data with array elements all treated in a similar way. “Architecures for image processing” immediately suggests parallel processors because of the enormous increase in speed. These processors enhance images in real time - TV rates - but this is less of a consideration where image collection takes more than a few seconds. Further, these machines are expensive and programming is difficult. For example, when the image is divided among processors as in Fig. 1 and 2, problems arise at the edges of the pieces. Issues such as cost, flexibility, ease of use and data integrity are often of more interest to the microscopist.Desktop computers present an ideal environment for off line processing of images with a few thousand pixels on an edge. These computers are adequately fast, they have sufficient storage and communication capability, and the software is less expensive than equivalent software for workstations or larger computers.

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