Статті в журналах: "Digital signal and image processing"

1

Braccini, C. "Digital image signal processing." Signal Processing 17, no. 2 (June 1989): 185–86. http://dx.doi.org/10.1016/0165-1684(89)90023-6.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

2

Bingol, A. "Digital image processing." IEEE Transactions on Acoustics, Speech, and Signal Processing 33, no. 4 (August 1985): 1063–64. http://dx.doi.org/10.1109/tassp.1985.1164618.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

3

Chen, Qunying. "Stepped Frequency Multiresolution Digital Signal Processing." Scientific Programming 2021 (June 8, 2021): 1–13. http://dx.doi.org/10.1155/2021/9081988.

Повний текст джерела

Анотація:

With the rapid development of radar industry technology, the corresponding signal processing technology becomes more and more complex. For the radar with short-range detection function, its corresponding signal mostly presents the characteristics of wide bandwidth and multiresolution. In the traditional data processing process, a large number of signals will interfere with the signal, which makes the final signal processing difficult or even impossible. Based on this problem, this paper proposes a principal component linear prediction processing algorithm based on clutter suppression processing on the basis of traditional signal processing algorithm. According to the curve characteristics of the data returned by the target detected by the signal, through certain image signal measurement and transformation, the clutter can be effectively suppressed and the typical characteristics of the corresponding target curve can be enhanced. For the convergence problem of signal processing and the corresponding image chromatic aberration compensation problem, this paper will realize the chromatic aberration compensation of the corresponding target echo image based on the radial pointing transverse mode algorithm and enhance the convergence speed of the whole algorithm system. In the experimental part of this paper, the optimization algorithm proposed in this paper is compared with the traditional algorithm. The experimental results show that the algorithm proposed in this paper has obvious advantages in the convergence of signal processing and antijamming performance and has the promotion value.

Стилі APA, Harvard, Vancouver, ISO та ін.

4

Silverman, Jason, Gail L. Rosen, and Steve Essinger. "Applications in Digital Image Processing." Mathematics Teacher 107, no. 1 (August 2013): 46–53. http://dx.doi.org/10.5951/mathteacher.107.1.0046.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

5

Raghavendra, V., N. Vinay kumar, and Manish Kumar. "Latest advancement in image processing techniques." International Journal of Engineering & Technology 7, no. 2.12 (April 3, 2018): 390. http://dx.doi.org/10.14419/ijet.v7i2.12.11357.

Повний текст джерела

Анотація:

Image processing is method of performing some operations on an image, for enhancing the image or for getting some information from that image, or for some other applications is nothing but Image Processing [1]. Image processing is one sort of signal processing, where input is an image and output may be an image, characteristics of that image or some features that image [1]. Image will be taken as a two dimensional signal and signal processing techniques will be applied to that two dimensional image. Image processing is one of the growing technologies [1]. In many real time applications image processing is widely used. In the field of bio technology, computer science, in medical field, envi-ronmental areas etc., image processing is being used for mankind benefits. The following steps are the basics of image processing:Image is taken as an inputImage will be processed (manipulation, analyzing the image, or as per requirement)Altered image will be the outputImage processing is of two typesAnalog Image Processing:As the name implies, analog image processing is applied on analog signals. Television image is best example of analog signal processing [1].(DIP) Digital Image Processing:DIP techniques are used on images, which are in the format of digital for processing them, and get the required output as per the application. Operations were applied on the digital images for processing [1].In this paper, we will discuss about the technologies or tools for image processing especially by using Open CV. With the help of Open CV image processing will be very easy and efficient. When Open CV is collaborated or integrated with python the results are mind blowing. We will discuss about the process of using python and Open CV.

Стилі APA, Harvard, Vancouver, ISO та ін.

6

Yamamoto, Yutaka, Kaoru Yamamoto, Masaaki Nagahara, and Pramod P. Khargonekar. "Signal processing via sampled-data control theory." Impact 2020, no. 2 (April 15, 2020): 6–8. http://dx.doi.org/10.21820/23987073.2020.2.6.

Повний текст джерела

Анотація:

Digital sounds and images are used everywhere today, and they are all generated originally by analogue signals. On the other hand, in digital signal processing, the storage or transmission of digital data, such as music, videos or image files, necessitates converting such analogue signals into digital signals via sampling. When these data are sampled, the values from the discrete, sampled points are kept while the information between the sampled points is lost. Various techniques have been developed over the years to recover this lost data, but the results remain incomplete. Professor Yutaka Yamamoto's research is focused on improving how we can recover or reconstruct the original analogue data.

Стилі APA, Harvard, Vancouver, ISO та ін.

7

Skorton, David J., Steve M. Collins, Ernest Garcia, Edward A. Geiser, Wayne Hillard, William Koppes, David Linker, and Gary Schwartz. "Digital signal and image processing in echocardiography." American Heart Journal 110, no. 6 (December 1985): 1266–83. http://dx.doi.org/10.1016/0002-8703(85)90024-9.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

8

Osten, Evariste F., and John C. Schultz. "A system for fast digital image processing of asynchronous SEM signals." Proceedings, annual meeting, Electron Microscopy Society of America 46 (1988): 676–77. http://dx.doi.org/10.1017/s0424820100105448.

Повний текст джерела

Анотація:

The time required to examine a specimen's features with an SEM before photographically recording representative images is related to the amount of visual information about that specimen that is available from the SEM's viewing CRT. In a laboratory that examines several thousand specimens each year, many in low signal-to-noise situations, the accumulated examination time can be significant. Image processing to increase the information content of the viewed image can reduce the time needed to examine the specimen. Digital frame integration can be used to improve an image's signal-to-noise ratio and color processing of the observed image can be used to provide enhanced visual perception. Using a passive interface with the SEM for image processing has the advantage that it doesn't interfere with the SEM scan electronics nor does it affect normal SEM operation. A difficulty in image processing arises when using asynchronous SEM signals - video signals that lack synch pulses and therefore do not conform to standard RS-170 video.

Стилі APA, Harvard, Vancouver, ISO та ін.

9

Van de Lest, C. H., E. M. Versteeg, J. H. Veerkamp, and T. H. Van Kuppevelt. "Elimination of autofluorescence in immunofluorescence microscopy with digital image processing." Journal of Histochemistry & Cytochemistry 43, no. 7 (July 1995): 727–30. http://dx.doi.org/10.1177/43.7.7608528.

Повний текст джерела

Анотація:

Autofluorescence can be a very disturbing factor in immunofluorescence microscopy. We present here a method to eliminate autofluorescence. The method is based on the fact that most autofluorescent compounds have broad-banded excitation and emission spectra, whereas specific fluorescent probes have narrow spectra. Two images are recorded and digitized, one at a wavelength exciting both the fluorescent probe and the autofluorescent molecules, and one at a wavelength exciting only the latter. Subtraction of the autofluorescence signal from the total fluorescence signal, using a self-developed computer program, results in an autofluorescence-free image. The procedure is demonstrated for elimination of elastin-derived autofluorescence in human lung alveoli and for elimination of lipofuscin-derived autofluorescence in human heart muscle. The autofluorescence signal is positively correlated with tissue section thickness (r = 0.93; p < 0.0001), and can be used to correct the specific fluorescence signals for section thickness.

Стилі APA, Harvard, Vancouver, ISO та ін.

10

Sanz, J., and E. Hinkle. "Computing projections of digital images in image processing pipeline architectures." IEEE Transactions on Acoustics, Speech, and Signal Processing 35, no. 2 (February 1987): 198–207. http://dx.doi.org/10.1109/tassp.1987.1165123.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

11

Tariq, Mashal, Ayesha A. Siddiqi, Ghous Baksh Narejo, and Shehla Andleeb. "A Cross Sectional Study of Tumors Using Bio-Medical Imaging Modalities." Current Medical Imaging Formerly Current Medical Imaging Reviews 15, no. 1 (December 7, 2018): 66–73. http://dx.doi.org/10.2174/1573405613666170614081434.

Повний текст джерела

Анотація:

Background: Digital Signal Processing (D.S.P) is an evolutionary field. It has a vast variety of applications in all fields. Bio medical engineering has various applications of digital signal processing. Digital Image Processing is one of the branches of signal processing. Medical image modalities proved to be helpful for disease diagnosis. Higher expertise is required in image analysis by medical professional, either doctors or radiologists. Methods: Extensive research is being done and has produced remarkable results. The study is divided into three main parts. The first deals with introduction of mostly used imaging modalities such as, magnetic resonance imaging, x-rays, ultrasound, positron emission tomography and computed tomography. The next section includes explanation of the basic steps of digital image processing are also explained in the paper. Magnetic Resonance imaging modalities is selected for this research paper. Different methods are tested on MRI images. Discussion: Brain images are selected with and without tumor. Solid cum Cystic tumor is opted for the r esearch. Results are discussed and shown. The software used for digital image processing is MATLAB. It has in built functions which are used throughout the study. The study represents the importance of DIP for tumor segmentation and detection. Conclusion: This study provides an initial guideline for researchers from both fields, that is, medicine and engineering. The analyses are shown and discussed in detail through images. This paper shows the significance of image processing platform for tumor detection automation.

Стилі APA, Harvard, Vancouver, ISO та ін.

12

Nicoll, G. R. "Digital Image Processing: a Practical Primer." IEE Proceedings F Communications, Radar and Signal Processing 132, no. 3 (1985): 202. http://dx.doi.org/10.1049/ip-f-1.1985.0046.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

13

He, Yang Ming, Yan Qiu He, Guang Yao Xiong, and Ming Feng Zhu. "Application of Halcon in Digital Image and Signal." Applied Mechanics and Materials 716-717 (December 2014): 1338–40. http://dx.doi.org/10.4028/www.scientific.net/amm.716-717.1338.

Повний текст джерела

Анотація:

Halcon is a machine vision software. It can process all kinds of image processing problem. In this paper, Halcon is used to process moving targets detection, from which it can be seen how the software Halcon is used to process digital image. The algorithm includes region_ growing algorithm, image filtering and morphological operators, etc. The software Halcon can be used in digital signal, too. In the end, it is used to process pulse signal. The result shows that Halcon has powerful functions in digital data processing.

Стилі APA, Harvard, Vancouver, ISO та ін.

14

Uomori, K., A. Morimura, H. Ishii, T. Sakaguchi, and Y. Kitamura. "Automatic image stabilizing system by full-digital signal processing." IEEE Transactions on Consumer Electronics 36, no. 3 (1990): 510–19. http://dx.doi.org/10.1109/30.103167.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

15

Yang, Hong Peng. "Computer Digital Image Processing Application and Research." Advanced Materials Research 926-930 (May 2014): 3389–92. http://dx.doi.org/10.4028/www.scientific.net/amr.926-930.3389.

Повний текст джерела

Анотація:

This paper Based on the analysis of the characteristics of image information and image information technology, analyzes some field demand for image information technology, analyzed the image application of news communication management, Analysis of domestic and foreign research present situation, proposed to increase the image signal, research ideas application depth and the breadth of color and its technology in the field , to accelerate the process of social normalization.

Стилі APA, Harvard, Vancouver, ISO та ін.

16

Basha, Shaik Mahaboob, and B. C. Jinaga. "A Novel Optimized Golomb-Rice Technique for the Reconstruction in Lossless Compression of Digital Images." ISRN Signal Processing 2013 (August 7, 2013): 1–5. http://dx.doi.org/10.1155/2013/539759.

Повний текст джерела

Анотація:

The research trends that are available in the area of image compression for various imaging applications are not adequate for some of the applications. These applications require good visual quality in processing. In general the tradeoff between compression efficiency and picture quality is the most important parameter to validate the work. The existing algorithms for still image compression were developed by considering the compression efficiency parameter by giving least importance to the visual quality in processing. Hence, we proposed a novel lossless image compression algorithm based on Golomb-Rice coding which was efficiently suited for various types of digital images. Thus, in this work, we specifically address the following problem that is to maintain the compression ratio for better visual quality in the reconstruction and considerable gain in the values of peak signal-to-noise ratios (PSNR). We considered medical images, satellite extracted images, and natural images for the inspection and proposed a novel technique to increase the visual quality of the reconstructed image.

Стилі APA, Harvard, Vancouver, ISO та ін.

17

Maria Riasat. "Research on various image processing techniques." Open Access Research Journal of Chemistry and Pharmacy 1, no. 1 (December 30, 2021): 005–12. http://dx.doi.org/10.53022/oarjcp.2021.1.1.0029.

Повний текст джерела

Анотація:

Digital image processing deals with the manipulation of digital images through a digital computer. It is a subfield of signals and systems but focuses particularly on images. DIP focuses on developing a computer system that can perform processing on an image. The input of that system is a digital image and the system process that image using efficient algorithms and gives an image as an output. The most common example is Adobe Photoshop. It is one of the widely used applications for processing digital images. The image processing techniques play a vital role in image Acquisition, image pre-processing, Clustering, Segmentation, and Classification techniques with different kinds of images such as Fruits, Medical, Vehicle, and Digital text images, etc. In this study, the various images remove unwanted noise and performance enhancement techniques such as contrast limited adaptive histogram equalization.

Стилі APA, Harvard, Vancouver, ISO та ін.

18

Mohanty, Sumant Sekhar, and Sushreeta Tripathy. "Application of Different Filtering Techniques in Digital Image Processing." Journal of Physics: Conference Series 2062, no. 1 (November 1, 2021): 012007. http://dx.doi.org/10.1088/1742-6596/2062/1/012007.

Повний текст джерела

Анотація:

Abstract Noise in an image is a random variation of brightness or color information in the original image. Noise is consistently presented in digital images during picture obtaining, coding, transmission, and processing steps. Image noise is most apparent in image regions with a low signal level. There are various reasons for the creation of noise in an image, such as electronic noise in amplifiers or detectors, disturbances and overheating of the sensor, disturbances in the medium of traveling for a digital image, etc. Noise is exceptionally hard to eliminate from the digital pictures without the earlier information of the noise model. There are various types of noise that can be available in a noise model. Filters are used to remove these types of noises in a digital image in image processing. In this research, we have implemented different filtering techniques that have been used to remove the noises in an image.

Стилі APA, Harvard, Vancouver, ISO та ін.

19

Gehlbach, Steve M., and F. Graham Sommer. "Frequency Diversity Speckle Processing." Ultrasonic Imaging 9, no. 2 (April 1987): 92–105. http://dx.doi.org/10.1177/016173468700900202.

Повний текст джерела

Анотація:

Ultrasonic waveform data from a tissue-mimicking phantom containing low contrast targets was digitized, stored and processed prior to creating and displaying ultrasonic images. Speckle reduction was performed by digital filtering of the waveform data with appropriately spaced and weighted digital filters, prior to both coherent and incoherent image averaging. The resultant images showed increased signal-to-noise ratios, consistent with theory. Better definition of low contrast target boundaries was noted in the processed, compared to unprocessed, images. Incoherent and coherent processing were investigated, and appeared to be equivalent.

Стилі APA, Harvard, Vancouver, ISO та ін.

20

Piva, Alessandro. "An Overview on Image Forensics." ISRN Signal Processing 2013 (January 10, 2013): 1–22. http://dx.doi.org/10.1155/2013/496701.

Повний текст джерела

Анотація:

The aim of this survey is to provide a comprehensive overview of the state of the art in the area of image forensics. These techniques have been designed to identify the source of a digital image or to determine whether the content is authentic or modified, without the knowledge of any prior information about the image under analysis (and thus are defined as passive). All these tools work by detecting the presence, the absence, or the incongruence of some traces intrinsically tied to the digital image by the acquisition device and by any other operation after its creation. The paper has been organized by classifying the tools according to the position in the history of the digital image in which the relative footprint is left: acquisition-based methods, coding-based methods, and editing-based schemes.

Стилі APA, Harvard, Vancouver, ISO та ін.

21

Sun, Mao Heng, Wei Jiang, Chen Hao Hu, and Tian Tian Feng. "Discussion on Excavation Monitoring Schemes Based on Image Processing." Applied Mechanics and Materials 71-78 (July 2011): 4317–20. http://dx.doi.org/10.4028/www.scientific.net/amm.71-78.4317.

Повний текст джерела

Анотація:

This study breaks through traditional displacement and inclination monitoring methods in excavation engineering, and proposes for the first time that combining excavation engineering with subjects such as Iconology, Signal Processing and Wireless Sensor Network, use Digital Signal Processing, Digital Image Processing, and Micro-Displacement Sensing technology for monitoring and processing various types of displacement. Then collect all monitoring points’ information through Internet of Things technology into database processing platform for processing, in order to achieve automatic real-time monitoring.

Стилі APA, Harvard, Vancouver, ISO та ін.

22

Wang, Jun Hong, Zong Rui Li, and Xi Bin Wang. "Application Research of Visual Processing Technology in the Industrial Production Line." Applied Mechanics and Materials 563 (May 2014): 338–41. http://dx.doi.org/10.4028/www.scientific.net/amm.563.338.

Повний текст джерела

Анотація:

The CCD image sensor is set in the different production position, whose output signal is converted into digital signals to a dedicated image processing system by A/D. Using the image enhancement, smoothing, sharpening, segmentation, feature extraction, image recognition and understanding of digital image processing techniques,the system can identify the image, compare with feature information preservation, decide whether to enter the next process according to the similarity degree of alignment. Visual inspection having high precision, fast speed, working in the industrial field is stable and reliable, and improves the level of automation of production, make the products more competitive.

Стилі APA, Harvard, Vancouver, ISO та ін.

23

Su, Su Yi Mon, and Jian Cheng Fang. "Analysis of Synthetic Aperture Radar Imaging and Signal Processing." Advanced Materials Research 433-440 (January 2012): 2004–10. http://dx.doi.org/10.4028/www.scientific.net/amr.433-440.2004.

Повний текст джерела

Анотація:

Digital signal processing is used to focus the image and obtain a higher resolution than achieved by conventional radar systems. This paper presents details of Synthetic Aperture Radar (SAR) signal processing and imaging technique with the goal of generating images. A Matlab based program is developed and coded for imaging simulation. It facilitates processing data and producing desired output. Then, we investigate the characteristics of Linear Frequency Modulated (LFM) signal prior to getting image results. The SAR properties in range and azimuth directions are described. The received signal and SAR raw data is theoretically described. In addition, the target reflection signal processing is also well presented. The SAR image formation is described using Range Doppler Algorithm (RDA). Finally, simulation parameters are computed and imaging simulation test is finished.

Стилі APA, Harvard, Vancouver, ISO та ін.

24

Kim, Byung-Gyu. "Digital Signal, Image and Video Processing for Emerging Multimedia Technology." Electronics 9, no. 12 (November 27, 2020): 2012. http://dx.doi.org/10.3390/electronics9122012.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

25

Scott, George. "Digital imagery for making plates." Journal of Micropalaeontology 14, no. 2 (October 1, 1995): 118. http://dx.doi.org/10.1144/jm.14.2.118.

Повний текст джерела

Анотація:

Abstract. Although the resolution and depth of focus provided by scanning electron microscopy (SEM) revolutionized the examination of several groups of microfossils, conventional photographic techniques are normally outlined in instructions for preparation of micrographs for publication (Whittaker & Hodgkinson, 1991). While the quality of results attainable by following these methods is very high, digital image recording and processing techniques are now well developed and readily available. This note outlines some advantages of digital techniques in the preparation of SEM images for publication.DIGITAL RECORDINGSecondary electron and other detectors attached to the SEM produce analogue (waveform) signals. In early instruments only these analogue signals were processed and displayed. Modern designs quantize signals from the detector as pixels (picture elements) which represent grey levels along scan lines. Pixel information is processed by the SEM on-board computer and saved as an image file. Importantly, the basic hardware to convert the analogue signal to digital form is simple and can be readily retro-fitted to early instruments. Our Philips PSEM 500 was adapted to record 128 grey levels at 800 pixels/line over 600 lines/frame, a minimum specification for professional work. Many micropalaeontologists will find that their SEM laboratories can supply digital files at higher resolutions. However, an essential point is to work with images recorded digitally directly from the SEM video channel, so avoiding potential degradation due to scanning of images recorded on film from the SEM monitors.DIGITAL PROCESSINGI use Photostyler (a PC image editor by Aldus Corp.) for plate composition. It resembles. . .

Стилі APA, Harvard, Vancouver, ISO та ін.

26

Rajabalipanah, Hamid, Ali Abdolali, Shahid Iqbal, Lei Zhang, and Tie Jun Cui. "Analog signal processing through space-time digital metasurfaces." Nanophotonics 10, no. 6 (March 29, 2021): 1753–64. http://dx.doi.org/10.1515/nanoph-2021-0006.

Повний текст джерела

Анотація:

Abstract In the quest to realize analog signal processing using subwavelength metasurfaces, in this paper, we present the first demonstration of programmable time-modulated metasurface processors based on the key properties of spatial Fourier transformation. Exploiting space-time coding strategy enables local, independent, and real-time engineering of not only amplitude but also phase profile of the contributing reflective digital meta-atoms at both central and harmonic frequencies. Several illustrative examples are demonstrated to show that the proposed multifunctional calculus metasurface is capable of implementing a large class of useful mathematical operators, including 1st- and 2nd-order spatial differentiation, 1st-order spatial integration, and integro-differential equation solving accompanied by frequency conversions. Unlike the recent proposals based on the Green’s function (GF) method, the designed time-modulated signal processor effectively operates for input signals containing wide spatial frequency bandwidths with an acceptable gain level. Proof-of-principle simulations are also reported to demonstrate the successful realization of image processing functions like edge detection. This time-varying wave-based computing system can set the direction for future developments of programmable metasurfaces with highly promising applications in ultrafast equation solving, real-time and continuous signal processing, and imaging.

Стилі APA, Harvard, Vancouver, ISO та ін.

27

Louk, Andreas Christian, Gede Bayu Suparta, and Nurul Hidayah. "Image Processing for Multiple Micro-Radiography Images." Advanced Materials Research 896 (February 2014): 676–80. http://dx.doi.org/10.4028/www.scientific.net/amr.896.676.

Повний текст джерела

Анотація:

An image processing method has been developed for processing multiple images of x-ray micro-radiography. An x-ray micro-radiography image reflects quantum mottle so that its information content may tends to be corrupted. Therefore, a digital processing method has been developed to reduce the effect of quantum mottle as well as reducing the noise level. A set of radiographs are collected then summed. An image subtraction by a background image is carried out prior to the summation process. The signal to noise ratio (SNR) and contrast to noise ratio (CNR) after processing are compared with the SNR and CNR prior to the processing. As a result the final image for small specimen under x-ray micro-radiography inspection is better than original image without processing based on SNR and CNR assessments.

Стилі APA, Harvard, Vancouver, ISO та ін.

28

Kumar, Ashwani, Paras Jain, Jabir Ali, Shrawan Kumar, and John Samuel Babu. "A lightweight buyer-seller watermarking protocol based on time-stamping and composite signal representation." International Journal of Engineering & Technology 7, no. 4.6 (September 25, 2018): 39. http://dx.doi.org/10.14419/ijet.v7i4.6.20230.

Повний текст джерела

Анотація:

The protocol allows a content provider to detect duplicate copy of a digital content and restrict the content provider who blames the innocent customer. This paper, proposed a lightweight protocol, which uses composite signal representation and time-stamping for watermark embedding and extraction. We have used timestamp, which tells at what time the digital content was created, signed or verified to digital watermarking algorithms and uses the composite signal representation for minimizing the overhead and bandwidth due to the use of composite signals. The suggested protocol uses composite signal representations and timestamp based methods with digital watermarking scheme for content authentication. Our watermark embedding and detection algorithm achieves a balance between robustness and image visual quality. Simulation results demonstrate that the algorithm used by proposed protocol has an increase robustness and good quality of watermark images as well and withstand against various image-processing attacks.

Стилі APA, Harvard, Vancouver, ISO та ін.

29

Wang, Xi, Taizheng Chen, Dongwei Li, and Shiqi Yu. "Processing Methods for Digital Image Data Based on the Geographic Information System." Complexity 2021 (June 22, 2021): 1–12. http://dx.doi.org/10.1155/2021/2319314.

Повний текст джерела

Анотація:

Digital image data processing is mainly to input digital image data into a computer to complete the conversion of a continuous spatially distributed image model into a discrete digital model so that the computer can identify, process, and store the processing process of digital image information. Geographic information system (GIS) is a computer system that integrates multiple forms of information expression, and it integrates functions such as collection, processing, transmission, storage, management, analysis, expression, and query retrieval, which can quickly discover the spatial distribution of things and their attributes and can express the results accurately and vividly in various intuitive forms. Therefore, on the basis of summarizing and analyzing previous research works, this paper expounded the research status and significance of processing methods for digital image data, elaborated the development background, current status, and future challenges of the GIS technology, introduced the methods and principles of permutation matrix algorithm and subimage averaging method, constructed the processing model for digital image data based on GIS, analyzed the data structure and its database establishment for digital image, proposed the processing methods for digital image data based on GIS, performed the enhancement processing and calculation classification of digital image data, and finally conducted a case analysis and its result discussion. The study results show that the proposed processing methods for digital image data based on GIS can perform analogue-to-digital conversion of continuous images, complete the steps of sampling, layering, and quantization, and then encode the obtained discrete digital signal into the computer to form an in-plane collection of pixels; this processing method can also organically combine spatial information and image data and identify, process, and store digital image data from both spatial and attribute aspects. The study results of this paper provide a reference for further research on the processing methods for digital image data based on GIS.

Стилі APA, Harvard, Vancouver, ISO та ін.

30

Wang, Chun Yu, Qing Wei Dong, Yang Li, and Xin Yue Xie. "Airborne Multispectral Imager Used in the UAV." Applied Mechanics and Materials 701-702 (December 2014): 283–87. http://dx.doi.org/10.4028/www.scientific.net/amm.701-702.283.

Повний текст джерела

Анотація:

Under existing conditions, the use of optical lens, imaging spectrometer, and the establishment of a rectangular CMOS image sensor spectral imaging system. Wide spectrum of white LED illuminated sample, by ordinary optical imaging lens, then the multi-channel narrowband filter array on the image plane splitting, and finally by the CMOS image acquisition system, converting optical signals into electrical signals, and then converted by the analog-digital converter chip to a digital signal to the computer. Finally, computer-spectral image cube collected for processing. At the same time, the advantages of airborne multispectral imager used in the UAV trials, obtain higher picture quality, and maintain a portable, imaging speed, and further validate the reliability of the experimental system.

Стилі APA, Harvard, Vancouver, ISO та ін.

31

Shimura, Takaki. "Special Issue of Digital Signal Processing on Biology and Image Processing in Medicine." IEEJ Transactions on Electronics, Information and Systems 118, no. 7-8 (1998): 978–81. http://dx.doi.org/10.1541/ieejeiss1987.118.7-8_978.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

32

Umemura, Shin-ichiro. "Special Issue of Digital Signal Processing on Biology and Image Processing in Medicine." IEEJ Transactions on Electronics, Information and Systems 118, no. 7-8 (1998): 982–85. http://dx.doi.org/10.1541/ieejeiss1987.118.7-8_982.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

33

Yan, Gao, Yan Liang, Xin Zhou, and Chun Xia Qi. "A Digital Watermarking Algorithm Based on the Wavelet Bit Plane Coding." Advanced Materials Research 821-822 (September 2013): 1438–41. http://dx.doi.org/10.4028/www.scientific.net/amr.821-822.1438.

Повний текст джерела

Анотація:

In this paper a algorithm of digital image watermark based on wavelet bit plane is introduced, and the original image is not required for detecting the watermarking. The digital watermark is embedded by changing information of some bit planes in DWT images at different resolutions. The watermark can be extracted on the difference bit plane values of subimages of the decomposed watermarked image which is then mapped to an image with a few shades of gray. Experimental results show that the watermark is robust to several signal processing techniques, including JPEG compression and some image processing operations

Стилі APA, Harvard, Vancouver, ISO та ін.

34

Wu, Ling Fan, Li Jun Yun, Jun Sheng Shi, Kun Wang, and Zhi Hui Deng. "Design and Implementation of the HD Video Signal Converter Based on FPGA." Advanced Engineering Forum 6-7 (September 2012): 571–75. http://dx.doi.org/10.4028/www.scientific.net/aef.6-7.571.

Повний текст джерела

Анотація:

In this paper, based on the FPGA and with a video dedicated A / D converter chip, LVDS coding chip, the design and implementation of a SD(standard-definition) analog video signals to HD(high-definition) digital video signal converter. First, input SD analog video into digital video signals meet the ITU-BT656 standard. Then use the FPGA with the video processing chip and DDR do some corresponding processing to achieve high-definition digital video output. After the actual test, the converter output signal of the image quality is well, meets the design requirements, and to verify the effectiveness of the program.

Стилі APA, Harvard, Vancouver, ISO та ін.

35

Mendhurwar, Kaustubha, Shivaji Patil, Harsh Sundani, Priyanka Aggarwal, and Vijay Devabhaktuni. "Edge-Detection in Noisy Images Using Independent Component Analysis." ISRN Signal Processing 2011 (April 10, 2011): 1–9. http://dx.doi.org/10.5402/2011/672353.

Повний текст джерела

Анотація:

Edges in a digital image provide important information about the objects contained within the image since they constitute boundaries between objects in the image. This paper proposes a new approach based on independent component analysis (ICA) for edge-detection in noisy images. The proposed approach works in two phases—the training phase and the edge-detection phase. The training phase is carried out only once to determine parameters for the ICA. Once calculated, these ICA parameters can be employed for edge-detection in any number of noisy images. The edge-detection phase deals with transitioning in and out of ICA domain and recovering the original image from a noisy image. Both gray scale as well as colored images corrupted with Gaussian noise are studied using the proposed approach, and remarkably improved results, compared to the existing edge-detection techniques, are achieved. Performance evaluation of the proposed approach using both subjective as well as objective methods is presented.

Стилі APA, Harvard, Vancouver, ISO та ін.

36

Ullah, Khalil, Khalil Khan, Muhammad Amin, Muhammad Attique, Tae-Sun Chung, and Rabia Riaz. "Multi-Channel Surface EMG Spatio-Temporal Image Enhancement Using Multi-Scale Hessian-Based Filters." Applied Sciences 10, no. 15 (July 24, 2020): 5099. http://dx.doi.org/10.3390/app10155099.

Повний текст джерела

Анотація:

Surface electromyography (sEMG) signals acquired with linear electrode array are useful in analyzing muscle anatomy and physiology. Most algorithms for signal processing, detection, and estimation require adequate quality of the input signals, however, multi-channel sEMG signals are commonly contaminated due to several noise sources. The sEMG signal needs to be enhanced prior to the digital signal and image processing to achieve the best results. This study is using spatio-temporal images to represent surface EMG signals. The motor unit action potential (MUAP) in these images looks like a linear structure, making certain angles with the x-axis, depending on the conduction velocity of the MU. A multi-scale Hessian-based filter is used to enhance the linear structure, i.e., the MUAP region, and to suppress the background noise. The proposed framework is compared with some of the existing algorithms using synthetic, simulated, and experimental sEMG signals. Results show improved detection accuracy of the motor unit action potential after the proposed enhancement as a preprocessing step.

Стилі APA, Harvard, Vancouver, ISO та ін.

37

Maharnisha, Gandla, Gandla Roopesh Kumar, and R. Arunraj. "Satellite Image Registration and Image Fusion by using Principle Component Analysis." International Journal of Engineering & Technology 7, no. 2.19 (April 17, 2018): 106. http://dx.doi.org/10.14419/ijet.v7i2.19.15063.

Повний текст джерела

Анотація:

This aims to fused image registration and image fusion used to spatial resolution images by principle component analysis method. Digital image processing requires either the full image or a part of image. It will be processed from the user’s point of view like the radius of object. Wavelet technique will improve the spatial resolution to produce spectral degradation in output image. To overcome the spectral degradation, PCA fusion method can be used. PCA uses curve which represent edges and extraction of the detailed information from the image.PAN and MS images are used by individual acquired low frequency approximate component and high frequency detail components in this PCA. To evaluate the image fusion accuracy, Peak Signal to Noise Ratio and Root Mean Square Error are used. The advantages of using digital image processing are preservation of original data accuracy, flexibility and repeatability.

Стилі APA, Harvard, Vancouver, ISO та ін.

38

Kumar, K. Sundeep, and B. Eswara Reddy. "Digital Analysis of Changes in Chronic Wounds through Image Processing." International Journal of Signal Processing, Image Processing and Pattern Recognition 6, no. 5 (October 31, 2013): 367–80. http://dx.doi.org/10.14257/ijsip.2013.6.5.32.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

39

Du, Yu Jian, Zu Bin Chen, Teng Yu, and Yang Yang. "FIR Digital Filter Design Based on Virtual Instrument." Advanced Materials Research 684 (April 2013): 653–56. http://dx.doi.org/10.4028/www.scientific.net/amr.684.653.

Повний текст джерела

Анотація:

With the information era and the advent of the digital world, digital signal processing has become extremely important in today's one of the disciplines and technical fields.Digital signal processing in seismic signal ,communications, voice, image, automatic control radar, and other fields has been widely used.In this paper,I design several kind of FIR digital filters based on virtual instrument to solve the problem that signal noise reduction.

Стилі APA, Harvard, Vancouver, ISO та ін.

40

Rayess, Diaa M. El, S. Ghoniemy, and S. F. Bahgat. "Digital image coding using legendre transform." Circuits Systems and Signal Processing 13, no. 1 (March 1994): 3–18. http://dx.doi.org/10.1007/bf01183838.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

41

Sridhar, P., and . "A Robust Digital Image Watermarking in Hybrid Frequency Domain." International Journal of Engineering & Technology 7, no. 3.6 (July 4, 2018): 243. http://dx.doi.org/10.14419/ijet.v7i3.6.14981.

Повний текст джерела

Анотація:

Image watermarking is a method to hide the secret information in a host image for copyright protection of watermark data during the transmission by means of insecure channel. The proposed scheme protects our data with adaptive level of visual quality and robustness against signal processing and geometric attacks. The proposed method divides the host image into four non-overlapping segments labelled as sub-images, DWT is applied on each sub images and then block based DCT is applied on mid frequency channels LH and HL of discrete wavelet transform. Embedded matrix is formed using hybrid transformed coefficients where matrix elements are chosen from the localized two mid frequency coefficients of each block in DCT. SV Decomposition is applied on embedded matrix to factorize it into singular values, left and right singular vectors and embed the scrambled watermark image along with scaling factor in singular value matrix. This repetition of watermark data in each sub-image reduces the PSNR values of the watermarked image. Despite this proposed scheme scales down PSNR value, changing the scaling factor favours to adjust the PSNR to the acceptable level and withstand the signal processing attacks such as JPEG compression and geometrical attack such as rotation, translation. Compared to the other method, the proposed scheme gives better correlation coefficient value for above mentioned kinds of attacks and also provide adaptive PSNR for imperceptibility on watermarked image.

Стилі APA, Harvard, Vancouver, ISO та ін.

42

Abdel-Qader, Ikhlas. "An Undergraduate Research Mentoring Model in Digital Signal and Image Processing." International Journal of Electrical Engineering & Education 41, no. 2 (April 2004): 146–57. http://dx.doi.org/10.7227/ijeee.41.2.6.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

43

Ngan, K. N., A. A. Kassim, and H. S. Singh. "Parallel image-processing system based on the TMS32010 digital signal processor." IEE Proceedings E Computers and Digital Techniques 134, no. 2 (1987): 119. http://dx.doi.org/10.1049/ip-e.1987.0021.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

44

Rosenfeld, Michael E. "Low-cost digital-image processing and analysis system for on-line morphometric measurements of sem images." Proceedings, annual meeting, Electron Microscopy Society of America 46 (1988): 432–33. http://dx.doi.org/10.1017/s0424820100104224.

Повний текст джерела

Анотація:

The widespread use of digital image processing systems for high resolution morphometric applications has been limited by the cost and difficulty of interfacing systems to electron microscopes. The recent development of image acquisition boards and software for PC-AT based systems and the availability of scanning electron microscopes that are capable of scanning at true TV rates (RS-170 compatible signals), have alleviated these problems. We have assembled a system consisting of a Compaq Portable 286 (Compaq Computer Corp. Houston, TX) equipped with an FG-100 image acquisition board (Imaging Technology Inc. Woburn, MA), interfaced with a Philips 515 SEM containing a motorized stage and Edax stage controller (Philips Electronics Inc. Mahwah, NJ).Utilizing commercially available software, this system has extensive image processing and morphometric analysis capabilities. For example, because TV scan rates generate images with low signal to noise ratios, improvement of the image quality is possible via real time image averaging and background subtraction using the the FG-100 board Feedback/Input lookup table.

Стилі APA, Harvard, Vancouver, ISO та ін.

45

Ren, Yong. "Traffic Signal Indicator Classification Based on Color-Shape Feature." Advanced Materials Research 765-767 (September 2013): 2797–800. http://dx.doi.org/10.4028/www.scientific.net/amr.765-767.2797.

Повний текст джерела

Анотація:

Traffic signal lights are generally composed by digital indicator and direction indicator. Its identification and classification is to analysis image content on the base of the semaphores characteristics, to identify the semaphores goals and classify them, including pre-processing, positioning, segmentation and classification. Based on image preprocessing, global threshold processing is used in the HSI color space to find the location of traffic signal lights; then to get each indicator through the projection method dividing; finally to distinguish digital processing and direction indicator by target detection algorithm based on the shape features of traffic signal lights. Simulation experiments show that the algorithm is reliable and executes efficiently with high accuracy.

Стилі APA, Harvard, Vancouver, ISO та ін.

46

Basha, Shaik Mahaboob, and B. C. Jinaga. "An Optimum Novel Technique Based on Golomb-Rice Coding for Lossless Image Compression of Digital Images." International Journal of Signal Processing, Image Processing and Pattern Recognition 6, no. 5 (October 31, 2013): 291–304. http://dx.doi.org/10.14257/ijsip.2013.6.5.26.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

47

Ranjan, Rakesh, and Dr Vinay Avasthi. "Enhanced Edge Detection Technique in Digital Images Using Optimised Fuzzy Operation." Webology 19, no. 1 (January 20, 2022): 5402–16. http://dx.doi.org/10.14704/web/v19i1/web19362.

Повний текст джерела

Анотація:

In image processing, edge detection is a critical issue. Edge detection is a key approach for evaluating the edge of various objects in a digital image. These edges are found using the gradients, which are present in the image. The intensity and value of pixels determine the gradients. In digital images, edge detection lowers the quantity of data and filters out irrelevant data while maintaining the image's key structural features. In this paper, a new edge detection approach based on a fuzzy rule-based system is proposed. In digital image processing, the proposed method typically depends on fuzzy logic systems. The main goal of this system is to show how fuzzy logic may be used in image processing. This paper provides a fuzzy logic-based edge detection technique that uses a sharpening Gabor filter to regulate edge quality and a Gaussian filter to reduce noise caused by sharpening. This is determined by utilizing applications such as “Peak Signal to Noise Ratio (PSNR) F-Measure, and Hausdorff distance (HoD) to prove that fuzzy logic outperforms the proposed system. The findings for edge detection approaches are included in high quality. The proposed approach outperforms most commonly used traditional edge detection methods. The proposed method also reduces the number of noisy features and may be used for a wide range of images.

Стилі APA, Harvard, Vancouver, ISO та ін.

48

Chen, Aiyong. "Digital Filtering Technology in Industrial Measuring and Control System." Electronics Science Technology and Application 2 (December 3, 2015): 42. http://dx.doi.org/10.18686/esta.v2i1.8.

Повний текст джерела

Анотація:

<p>This article aims at the technical problems in modernized industrial measuring and control system such as interruption signal, noise signal and other useless signal. First introduces the features and importance of digital filtering technology and then elaborates on the realization methods of digital filtering and frequently used digital filtering calculation methods in the industrial measuring system. The research reveals that integrated usage of numerous methods or even complex digital filtering technology is adopted to calculate and treat such digital signals like random interruption, heat noise, system noise, measuring error and zero-point offset and thus meet the system requirements. The digital filtering technology is widely applied in the processing of HD signal, such as digital audio, radar, image processing, data transmission and biological and medical fields and pledges to provide strong assurance for the real-time, stable and reliable properties of modernized industrial measuring and control system.</p><div> </div><div> </div>

Стилі APA, Harvard, Vancouver, ISO та ін.

49

Catthoor, F., and H. J. De Man. "Application-specific architectural methodologies for high-throughput digital signal and image processing." IEEE Transactions on Acoustics, Speech, and Signal Processing 38, no. 2 (1990): 339–49. http://dx.doi.org/10.1109/29.103069.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

50

Renshaw, Devin T., and John A. Christian. "Subpixel Localization of Isolated Edges and Streaks in Digital Images." Journal of Imaging 6, no. 5 (May 18, 2020): 33. http://dx.doi.org/10.3390/jimaging6050033.

Повний текст джерела

Анотація:

Many modern sensing systems rely on the accurate extraction of measurement data from digital images. The localization of edges and streaks in digital images is an important example of this type of measurement, with these techniques appearing in many image processing pipelines. Several approaches attempt to solve this problem at both the pixel level and subpixel level. While the subpixel methods are often necessary for applications requiring best-possible accuracy, they are often susceptible to noise, use iterative methods, or require pre-processing. This work investigates a unified framework for subpixel edge and streak localization using Zernike moments with ramp-based and wedge-based signal models. The method described here is found to outperform the current state-of-the-art for digital images with common signal-to-noise ratios. Performance is demonstrated on both synthetic and real images.

Стилі APA, Harvard, Vancouver, ISO та ін.

Статті в журналах з теми "Digital signal and image processing"

Оформте джерело за APA, MLA, Chicago, Harvard та іншими стилями