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Literatura académica sobre el tema "Compression scheme"

Autor: Grafiati

Publicado: 25 de mayo de 2024

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Artículos de revistas sobre el tema "Compression scheme"

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Jha, Mithilesh Kumar, Brejesh Lall y Sumantra Dutta Roy. "Statistically Matched Wavelet Based Texture Synthesis in a Compressive Sensing Framework". ISRN Signal Processing 2014 (17 de febrero de 2014): 1–18. http://dx.doi.org/10.1155/2014/838315.

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This paper proposes a statistically matched wavelet based textured image coding scheme for efficient representation of texture data in a compressive sensing (CS) frame work. Statistically matched wavelet based data representation causes most of the captured energy to be concentrated in the approximation subspace, while very little information remains in the detail subspace. We encode not the full-resolution statistically matched wavelet subband coefficients but only the approximation subband coefficients (LL) using standard image compression scheme like JPEG2000. The detail subband coefficients, that is, HL, LH, and HH, are jointly encoded in a compressive sensing framework. Compressive sensing technique has proved that it is possible to achieve a sampling rate lower than the Nyquist rate with acceptable reconstruction quality. The experimental results demonstrate that the proposed scheme can provide better PSNR and MOS with a similar compression ratio than the conventional DWT-based image compression schemes in a CS framework and other wavelet based texture synthesis schemes like HMT-3S.

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Gao, Jian Qiang, Shao Dong Sun, Li Kun Wang y Ning Wang. "The Analysis on the Scheme of the Flue Gas Compressor of a 300 MW Oxy-Fuel Pulverized Coal Fired Boiler". Applied Mechanics and Materials 602-605 (agosto de 2014): 638–41. http://dx.doi.org/10.4028/www.scientific.net/amm.602-605.638.

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The compression of the flue gas is one of the most critical processes of CO2 recycling in oxy-fuel combustion technology. With a 300 MW Oxy-fuel pulverized coal fired boiler taken as an example of study, the selection of compressors of its flue gas compressing system is analyzed by the thermodynamic calculation. In this paper, two centrifugal compressors with the same specification are in parallel running as Scheme 1 of selection, while an axial compressor and a piston compressor are in series operation as Scheme 2 of selection. It shows that the Scheme 2 has the advantage of the energy consumption and water separation of the flue gas in inter-cooler comparing with Scheme1.

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3

Xu, Haoran, Petr M. Anisimov, Bruce E. Carlsten, Leanne D. Duffy, Quinn R. Marksteiner y River R. Robles. "X-ray Free Electron Laser Accelerator Lattice Design Using Laser-Assisted Bunch Compression". Applied Sciences 13, n.º 4 (10 de febrero de 2023): 2285. http://dx.doi.org/10.3390/app13042285.

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We report the start-to-end modeling of our accelerator lattice design employing a laser-assisted bunch compression (LABC) scheme in an X-ray free electron laser (XFEL), using the proposed Matter-Radiation Interactions in Extremes (MaRIE) XFEL parameters. The accelerator lattice utilized a two-stage bunch compression scheme, with the first bunch compressor performing a conventional bulk compression enhancing the beam current from 20 A to 500 A, at 750 MeV. The second bunch compression was achieved by modulating the beam immediately downstream of the first bunch compressor by a laser with 1-μm wavelength in a laser modulator, accelerating the beam to the final energy of 12 GeV, and compressing the individual 1-μm periods of the modulated beam into a sequence of microbunches with 3-kA current spikes by the second bunch compressor. The LABC architecture presented had been developed based on the scheme of enhanced self-amplified spontaneous emission (ESASE), but operated in a disparate regime of parameters. Enabled by the novel technology of the cryogenic normal conducting radiofrequency photoinjector, we investigated an electron beam with ultra-low emittance at the starting point of the lattice design. Our work aimed at mitigating the well-known beam instabilities to preserve the beam emittance and suppress the energy spread growth.

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Armenta Ramade, Álvaro y Arturo Serrano Santoyo. "802.11g multilayer header compression for VoIP in remote rural contexts". Revista Facultad de Ingeniería Universidad de Antioquia, n.º 71 (4 de marzo de 2014): 101–14. http://dx.doi.org/10.17533/udea.redin.15011.

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This article presents a Multilayer Header Compression scheme for VoIP packets in 802.11 wireless networks that does not require context synchronization of compressor and decompressor units. The reduction of the header size is accomplished through the static field compression of the RTP/UDP/IP headers in conjunction with an 8 bit virtual addressing in the 802.11 MAC layer. Considering the RTP/UDP/IP/MAC header fields, this scheme allows 48% header compression efficiency compared with 41% provided by the CRTP and RoHC schemes. Given that our proposal does not require context synchronization, the decompressor will regenerate the headers even in high packet loss rate conditions.

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Waleed, Muhammad, Tai-Won Um, Aftab Khan y Ali Khan. "On the Utilization of Reversible Colour Transforms for Lossless 2-D Data Compression". Applied Sciences 10, n.º 3 (31 de enero de 2020): 937. http://dx.doi.org/10.3390/app10030937.

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Reversible Colour Transforms (RCTs) in conjunction with Bi-level Burrows–Wheeler Compression Algorithm (BBWCA) allows for high-level lossless image compression as demonstrated in this study. The RCTs transformation results in exceedingly coordinated image information among the neighbouring pixels as compared to the RGB colour space. This aids the Burrows–Wheeler Transform (BWT) based compression scheme and achieves compression ratios of high degree at the subsequent steps of the program. Validation has been done by comparing the proposed scheme across a range of benchmarks schemes and the performance of the proposed scheme is above par the other schemes. The proposed compression outperforms the techniques exclusively developed for 2-D electrocardiogram (EEG), RASTER map and Color Filter Array (CFA) image compression. The proposed system shows no dependency over parameters like image size, its type or the medium in which it is captured. A comprehensive analysis of the proposed scheme concludes that it achieves a significant increase in compression and depicts comparable complexity similar to the various benchmark schemes.

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Moreno-Alvarado, Rodolfo, Eduardo Rivera-Jaramillo, Mariko Nakano y Hector Perez-Meana. "Simultaneous Audio Encryption and Compression Using Compressive Sensing Techniques". Electronics 9, n.º 5 (22 de mayo de 2020): 863. http://dx.doi.org/10.3390/electronics9050863.

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The development of coding schemes with the capacity to simultaneously encrypt and compress audio signals is a subject of active research because of the increasing necessity for transmitting sensitive audio information over insecure communication channels. Thus, several schemes have been developed; firstly, some of them compress the digital information and subsequently encrypt the resulting information. These schemas efficiently compress and encrypt the information. However, they may compromise the information as it can be accessed before encryption. To overcome this problem, a compressing sensing-based system to simultaneously compress and encrypt audio signals is proposed in which the audio signal is segmented in frames of 1024 samples and transformed into a sparse frame using the discrete cosine transform (DCT). Each frame is then multiplied by a different sensing matrix generated using the chaotic mixing scheme. This fact allows that the proposed scheme satisfies the extended Wyner secrecy (EWS) criterion. The evaluation results obtained using several genres of audio signals show that the proposed system allows to simultaneously compress and encrypt audio signals, satisfying the EWS criterion.

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7

Chen, Yang y Zheng Qin. "Region-Based Image-Fusion Framework for Compressive Imaging". Journal of Applied Mathematics 2014 (2014): 1–9. http://dx.doi.org/10.1155/2014/219540.

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A novel region-based image-fusion framework for compressive imaging (CI) and its implementation scheme are proposed. Unlike previous works on conventional image fusion, we consider both compression capability on sensor side and intelligent understanding of the image contents in the image fusion. Firstly, the compressed sensing theory and normalized cut theory are introduced. Then region-based image-fusion framework for compressive imaging is proposed and its corresponding fusion scheme is constructed. Experiment results demonstrate that the proposed scheme delivers superior performance over traditional compressive image-fusion schemes in terms of both object metrics and visual quality.

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8

Wang, Zi Long, Tu Ji, Mei Song Zheng, Jun Ye Wang y Li Jian Li. "An Efficient Two-Dimension BIST Compression Approach". Applied Mechanics and Materials 713-715 (enero de 2015): 552–57. http://dx.doi.org/10.4028/www.scientific.net/amm.713-715.552.

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In this paper a two-dimension BIST compression scheme is presented; the proposed scheme is utilized in order to drive down the number of deterministic vectors to achieve complete fault coverage in BIST applications. By introducing shifting compression and input reduction, vertical and horizontal compression are realized respectively to achieve two-dimension BIST compression. Experimental results show that the BIST shifting compression based on input reduction can achieve great compression rate as much as 99%. Comparisons with previously competitive presented schemes indicate that the proposed scheme provide an efficient BIST compression approach with lower storage overhead.

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9

ACHARYA, TINKU y AMAR MUKHERJEE. "HIGH-SPEED PARALLEL VLSI ARCHITECTURES FOR IMAGE DECORRELATION". International Journal of Pattern Recognition and Artificial Intelligence 09, n.º 02 (abril de 1995): 343–65. http://dx.doi.org/10.1142/s021800149500016x.

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We present a new high speed parallel architecture and its VLSI implementation to design a special purpose hardware for real-time lossless image compression/ decompression using a decorrelation scheme. The proposed architecture can easily be implemented using state-of-the-art VLSI technology. The hardware yields a high compression rate. A prototype 1-micron VLSI chip based on this architectural idea has been designed. The scheme is favourably comparable to the lossless JPEG standard image compression schemes. We also discuss the parallelization issues of the lossless JPEG standard still compression schemes and their difficulties.

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10

HU, YU-CHEN. "LOW BIT-RATE IMAGE COMPRESSION SCHEMES BASED ON VECTOR QUANTIZATION". International Journal of Image and Graphics 05, n.º 04 (octubre de 2005): 745–64. http://dx.doi.org/10.1142/s0219467805001963.

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Three image compression schemes based on vector quantization are proposed in this paper. The block similarity property among neighboring image blocks is exploited in these schemes to cut down the bit rate of the vector quantization scheme. For the first scheme, the correlation among the encoded block to the left and the encoded block directly above the current processing block is exploited. In the second scheme, the relative addressing technique is incorporated into the encoding procedure. Finally, the third scheme introduces a simple technique to reduce the required bit rate with only a slight reduction in image quality. According to the experimental results, it is shown that these proposed schemes not only reduce storage costs but also achieve good reconstructed image quality. Furthermore, the required computational cost for the encoding/decoding procedures of these schemes is less than that of the conventional vector quantization scheme. In other words, these schemes are suitable for the compression of digital images.

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Tesis sobre el tema "Compression scheme"

1

Lim, Seng. "Image compression scheme for network transmission". Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1995. http://handle.dtic.mil/100.2/ADA294959.

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Li, Yun, Mårten Sjöström, Ulf Jennehag, Roger Olsson y Tourancheau Sylvain. "Subjective Evaluation of an Edge-based Depth Image Compression Scheme". Mittuniversitetet, Avdelningen för informations- och kommunikationssystem, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:miun:diva-18539.

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Multi-view three-dimensional television requires many views, which may be synthesized from two-dimensional images with accompanying pixel-wise depth information. This depth image, which typically consists of smooth areas and sharp transitions at object borders, must be consistent with the acquired scene in order for synthesized views to be of good quality. We have previously proposed a depth image coding scheme that preserves significant edges and encodes smooth areas between these. An objective evaluation considering the structural similarity (SSIM) index for synthesized views demonstrated an advantage to the proposed scheme over the High Efficiency Video Coding (HEVC) intra mode in certain cases. However, there were some discrepancies between the outcomes from the objective evaluation and from our visual inspection, which motivated this study of subjective tests. The test was conducted according to ITU-R BT.500-13 recommendation with Stimulus-comparison methods. The results from the subjective test showed that the proposed scheme performs slightly better than HEVC with statistical significance at majority of the tested bit rates for the given contents.

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3

Mensmann, Jörg, Timo Ropinski y Klaus Hinrichs. "A GPU-Supported Lossless Compression Scheme for Rendering Time-Varying Volume Data". University of Münster, Germany, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-92867.

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Since the size of time-varying volumetric data sets typically exceeds the amount of available GPU and main memory, out-of-core streaming techniques are required to support interactive rendering. To deal with the performance bottlenecks of hard-disk transfer rate and graphics bus bandwidth, we present a hybrid CPU/GPU scheme for lossless compression and data streaming that combines a temporal prediction model, which allows to exploit coherence between time steps, and variable-length coding with a fast block compression algorithm. This combination becomes possible by exploiting the CUDA computing architecture for unpacking and assembling data packets on the GPU. The system allows near-interactive performance even for rendering large real-world data sets with a low signal-to-noise-ratio, while not degrading image quality. It uses standard volume raycasting and can be easily combined with existing acceleration methods and advanced visualization techniques.

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4

Bernat, Andrew. "Which partition scheme for what image?, partitioned iterated function systems for fractal image compression". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2002. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp05/MQ65602.pdf.

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Kadri, Imen. "Controlled estimation algorithms of disparity map using a compensation compression scheme for stereoscopic image coding". Thesis, Paris 13, 2020. http://www.theses.fr/2020PA131002.

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Ces dernières années ont vu apparaître de nombreuses applications utilisant la technologie 3D tels que les écrans de télévisions 3D, les écrans auto-stéréoscopiques ou encore la visio-conférence stéréoscopique. Cependant ces applications nécessitent des techniques bien adaptées pour comprimer efficacement le volume important de données à transmettre ou à stocker. Les travaux développés dans cette thèse concernent le codage d’images stéréoscopiques et s’intéressent en particulier à l'amélioration de l'estimation de la carte de disparité dans un schéma de Compression avec Compensation de Disparité (CCD). Habituellement, l'algorithme d’appariement de blocs similaires dans les deux vues permet d’estimer la carte de disparité en cherchant à minimiser l’erreur quadratique moyenne entre la vue originale et sa version reconstruite sans compensation de disparité. L’erreur de reconstruction est ensuite codée puis décodée afin d’affiner (compenser) la vue prédite. Pour améliorer la qualité de la vue reconstruite, dans un schéma de codage par CCD, nous avons prouvé que le concept de sélectionner la disparité en fonction de l'image compensée plutôt que de l'image prédite donne de meilleurs résultats. En effet, les simulations montrent que notre algorithme non seulement réduit la redondance inter-vue mais également améliore la qualité de la vue reconstruite et compensée par rapport à la méthode habituelle de codage avec compensation de disparité. Cependant, cet algorithme de codage requiert une grande complexité de calculs. Pour remédier à ce problème, une modélisation simplifiée de la manière dont le codeur JPEG (à savoir la quantification des composantes DCT) impacte la qualité de l’information codée est proposée. En effet, cette modélisation a permis non seulement de réduire la complexité de calculs mais également d’améliorer la qualité de l’image stéréoscopique décodée dans un contexte CCD. Dans la dernière partie, une métrique minimisant conjointement la distorsion et le débit binaire est proposée pour estimer la carte de disparité en combinant deux algorithmes de codage d’images stéréoscopiques dans un schéma CCD
Nowadays, 3D technology is of ever growing demand because stereoscopic imagingcreate an immersion sensation. However, the price of this realistic representation is thedoubling of information needed for storage or transmission purpose compared to 2Dimage because a stereoscopic pair results from the generation of two views of the samescene. This thesis focused on stereoscopic image coding and in particular improving thedisparity map estimation when using the Disparity Compensated Compression (DCC)scheme.Classically, when using Block Matching algorithm with the DCC, a disparity mapis estimated between the left image and the right one. A predicted image is thencomputed.The difference between the original right view and its prediction is called theresidual error. This latter, after encoding and decoding, is injected to reconstruct theright view by compensation (i.e. refinement) . Our first developed algorithm takes intoaccount this refinement to estimate the disparity map. This gives a proof of conceptshowing that selecting disparity according to the compensated image instead of thepredicted one is more efficient. But this done at the expense of an increased numericalcomplexity. To deal with this shortcoming, a simplified modelling of how the JPEGcoder, exploiting the quantization of the DCT components, used for the residual erroryields with the compensation is proposed. In the last part, to select the disparity mapminimizing a joint bitrate-distortion metric is proposed. It is based on the bitrateneeded for encoding the disparity map and the distortion of the predicted view.This isby combining two existing stereoscopic image coding algorithms

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6

Philibert, Manon. "Cubes partiels : complétion, compression, plongement". Electronic Thesis or Diss., Aix-Marseille, 2021. http://www.theses.fr/2021AIXM0403.

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Les sous-graphes isométriques d'hypercubes (dit cubes partiels) constituent une classe centrale de la théorie métrique des graphes. Ils englobent des familles de graphes importantes (arbres, graphes médians, etc.), provenant de différents domaines de recherche, tels que la géométrie discrète, la combinatoire ou la théorie géométrique des groupes. Nous étudions tout d'abord la structure des cubes partiels de VC-dimension 2. Nous montrons que ces graphes peuvent être obtenus par amalgamations à partir de deux types de cellules combinatoires.Cette décomposition nous permet d’obtenir diverses caractérisations. En particulier, tout cube partiel de VC-dimension 2 peut être complété en cube partiel ample de VC-dimension 2. Nous montrons ensuite que les graphes de topes des matroïdes orientés et des complexes de matroïdes orientés uniformes peuvent aussi être complétés en cubes partiels amples de même VC-dimension.En utilisant un résultat de Moran et Warmuth, nous établissons que ces classes vérifient la conjecture de Floyd et Warmuth, l'une des plus vielles conjectures en théorie de l'apprentissage. C'est-à-dire qu'elles admettent des schémas de compression (étiquetés non propres) de taille leur VC-dimension.Par la suite, nous décrivons un schéma de compression étiqueté propre de taille d pour les complexes de matroïdes orientés de VC-dimension d, généralisant ainsi le résultat de Moran et Warmuth pour les amples. Enfin, nous fournissons une caractérisation par pc-mineurs exclus et parsous-graphes isométriques interdits des cubes partiels plongeables isométriquement dans la grille Z^2 et dans le cylindre P_n \square C_{2k} pour un certain n et k > 4
Partial cubes (aka isometric subgraphs of hypercubes) are a fundamental class of metric graph theory. They comprise many important graph classes (trees, median graphs, tope graphs of complexes of oriented matroids, etc.), arising from different areas of research such as discrete geometry, combinatorics or geometric group theory.First, we investigate the structure of partial cubes of VC-dimension 2. We show that those graphs can be obtained via amalgams from even cycles and full subdivisions of complete graphs. This decomposition allows us to obtain various characterizations. In particular, any partial cube can be completed to an ample partial cube of VC-dimension 2. Then, we show that the tope graphs of oriented matroids and complexes of uniform oriented matroids can also be completed to ample partial cubes of the same VC-dimension.Using a result of Moran and Warmuth, we establish that those classes satisfy the conjecture of Floyd and Warmuth, one of the oldest open problems in computational machine learning. Particularly, they admit (improper labeled) compression schemes of size their VC-dimension.Next, we describe a proper labeled compression scheme of size d for complexes of oriented matroids of VC-dimension d, generalizing the result of Moran and Warmuth for ample sets. Finally, we give a characterization via excluded pc-minors and via forbidden isometric subgraphs of partial cubes isometrically embedded into the grid \mathbb{Z}^2 and the cylinder P_n \square C_{2k} for some n and k > 4

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7

Samuel, Sindhu. "Digital rights management (DRM) : watermark encoding scheme for JPEG images". Pretoria : [s.n.], 2007. http://upetd.up.ac.za/thesis/available/etd-09122008-182920/.

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8

Bekkouche, Hocine. "Synthèse de bancs de filtres adaptés, application à la compression des images". Phd thesis, Université Paris Sud - Paris XI, 2007. http://tel.archives-ouvertes.fr/tel-00345288.

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Les travaux développés dans cette thèse portent sur les décompositions multirésolution dans un cadre de lifting scheme, appliquées à la compression d'images. Pour commencer, une structure de décomposition consistant en un “lifting scheme généralisé” est proposée. Ce schéma permet d'exploiter toute l'information disponible au décodage dans l'étape de prédiction. Cela est rendu possible par l'ajout d'un filtre de prédiction supplémentaire par rapport à la structure classique de lifting scheme. Le schéma proposé est ensuite associé à deux méthodes d'adaptation. La première, appelée GAE, suppose une stationnarité globale de l'image, tandis que la seconde, LAE ne suppose qu'une stationnarité locale de l'image. Dans ce dernier cas, les filtres prédicteurs sont adaptatifs. Trois applications de ces méthodes en compression d'images sont ensuite proposées. Dans un premier temps, une comparaison des performances en compression sans perte sur des images de textures, synthétiques, gaussiennes, à stationnarités locale et globale (vérifiant les hypothèses plus haut), est réalisée. Sur ces signaux, les mesures d'entropie d'ordre 1 ont montré que les méthodes proposées offrent en moyenne un gain en codage de 0,5 bpp (GAE) et 0,8 bpp (LAE) par rapport à la décomposition en ondelette (9,7), de 0,8 bpp (GAE) et 1,11 bpp (LAE) par rapport à la (5,3) et de 0,41 bpp (GAE) et 0,65 bpp (LAE) par rapport à la méthode de Gerek et Çetin. La deuxième application concerne le codage sans perte d'images réelles de natures variées. Les gains par rapport à l'état de l'art se sont révélés plus faibles que ceux obtenus pour les images synthétiques. Enfin, la dernière application traite les cas du codage progressif et du codage avec perte. Pour la compression avec pertes, nous avons modifié la méthode LAE pour palier aux problèmes de divergence dus à l'impossibilité au niveau du décodeur de reconstruire les filtres prédicteurs à partir d'échantillons quantifiés. Elle se révèle plus efficace que lorsque l'on utilise les filtres usuels de longueur fixe (9,7) et (5,3).

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9

Ali, Azad [Verfasser], Neeraj [Akademischer Betreuer] Suri, Christian [Akademischer Betreuer] Becker, Stefan [Akademischer Betreuer] Katzenbeisser, Andy [Akademischer Betreuer] Schürr y Marc [Akademischer Betreuer] Fischlin. "Fault-Tolerant Spatio-Temporal Compression Scheme for Wireless Sensor Networks / Azad Ali ; Neeraj Suri, Christian Becker, Stefan Katzenbeisser, Andy Schürr, Marc Fischlin". Darmstadt : Universitäts- und Landesbibliothek Darmstadt, 2017. http://d-nb.info/1127225405/34.

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Průša, Zdeněk. "Efektivní nástroj pro kompresi obrazu v jazyce Java". Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2008. http://www.nusl.cz/ntk/nusl-217433.

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This diploma thesis deals with digital image lossy compression. Lossy compression in general inserts some kind of distorsion to the resulting image. The distorsion should not be interupting or even noticable in the better case. For image analysis there is used process called transformation and for choosing relevant coefficients process called coding. Evaluation of image quallity can be done by objective or subjective method. There is encoder introduced and realized in this work. Encoder utilizes two-dimension wavelet transform and SPIHT algortihm for coefficient coding. It was made use of accelerated method of wavelet transform computation by lifting scheme. Coder can proccess color information of images using modificated original SPIHT algorithm. For implementation the JAVA programming language was employed. The object-oriented design principes was made use of and thus the program is easy to extended. At demonstaration pictures there are shown effectiveness and characteristic way of distorsion of the proposed coder at high compression rates.

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Libros sobre el tema "Compression scheme"

1

Charles, Fenimore y National Institute of Standards and Technology (U.S.), eds. Characterization of projection systems for the MPEG-4 digital cinema compression scheme evaluation. Gaithersburg, MD: U.S. Dept. of Commerce, Technology Administration, National Institute of Standards and Technology, 2001.

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Charles, Fenimore y National Institute of Standards and Technology (U.S.), eds. Characterization of projection systems for the MPEG-4 digital cinema compression scheme evaluation. Gaithersburg, MD: U.S. Dept. of Commerce, Technology Administration, National Institute of Standards and Technology, 2001.

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Charles, Fenimore y National Institute of Standards and Technology (U.S.), eds. Characterization of projection systems for the MPEG-4 digital cinema compression scheme evaluation. Gaithersburg, MD: U.S. Dept. of Commerce, Technology Administration, National Institute of Standards and Technology, 2001.

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Charles, Fenimore y National Institute of Standards and Technology (U.S.), eds. Characterization of projection systems for the MPEG-4 digital cinema compression scheme evaluation. Gaithersburg, MD: U.S. Dept. of Commerce, Technology Administration, National Institute of Standards and Technology, 2001.

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Ravindra Babu, T., M. Narasimha Murty y S. V. Subrahmanya. Compression Schemes for Mining Large Datasets. London: Springer London, 2013. http://dx.doi.org/10.1007/978-1-4471-5607-9.

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Tudor, P. N. Digital video compression: Standardisation of scalable coding schemes. London: British Broadcasting Corporation. Research and Development Department, 1994.

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7

Aburas, Abdul Razag Ali. Data compression schemes for pattern recognition in digital images using fractals. Leicester: De Montfort University, 1997.

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8

United States. National Aeronautics and Space Administration., ed. An artificial compression method for ENO schemes: The slope modification method. Los Angeles, Calif: Dept. fo Mathematics, UCLA, 1988.

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Aburas, Abdul Razag Ali. Data compression schemes for pattern recognition in digital images using fractals. Leicester: SERCentre, De Montfort University, 1997.

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10

Currie, Daniel L. Implementation and efficiency of steganographic techniques in bitmapped images and embedded data survivability against lossy compression schemes. Monterey, Calif: Naval Postgraduate School, 1996.

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Capítulos de libros sobre el tema "Compression scheme"

1

Ravindra Babu, T., M. Narasimha Murty y S. V. Subrahmanya. "Run-Length-Encoded Compression Scheme". En Compression Schemes for Mining Large Datasets, 47–66. London: Springer London, 2013. http://dx.doi.org/10.1007/978-1-4471-5607-9_3.

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Schuster, Guido M. y Aggelos K. Katsaggelos. "An Optimal Polygonal Boundary Encoding Scheme". En Rate-Distortion Based Video Compression, 217–66. Boston, MA: Springer US, 1997. http://dx.doi.org/10.1007/978-1-4757-2566-7_8.

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Gupta, Rupesh y Santanu Chaudhury. "A Scheme for Attentional Video Compression". En Lecture Notes in Computer Science, 458–65. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-21786-9_74.

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El-Qawasmeh, Eyas, Ahmed Mansour y Mohammad Al-Towiq. "Development of a New Compression Scheme". En Networked Digital Technologies, 85–90. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-14292-5_9.

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Chaabane, Wafa, Régis Fournier, Amine Naït-ali, Julio Jacobo, Marta Mejail, Marcelo Mottalli, Heitor Ramos, Alejandro C. Frery y Leonardo Viana. "Supervised Biometric System Using Multimodal Compression Scheme". En Progress in Pattern Recognition, Image Analysis, Computer Vision, and Applications, 382–89. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-33275-3_47.

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Vivek, Srinivas. "Revisiting a Masked Lookup-Table Compression Scheme". En Lecture Notes in Computer Science, 369–83. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-71667-1_19.

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Kim, Mi-Ae, Kil-Sang Yoo y Won-Hyung Lee. "Fragile Watermarking Scheme for Accepting Image Compression". En Embedded and Ubiquitous Computing – EUC 2005, 940–46. Berlin, Heidelberg: Springer Berlin Heidelberg, 2005. http://dx.doi.org/10.1007/11596356_93.

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Pinter, Shlomit S. y Israel Waldman. "Selective Code Compression Scheme for Embedded Systems". En Lecture Notes in Computer Science, 298–316. Berlin, Heidelberg: Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-71528-3_19.

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Itokawa, Yuko, Koichiro Katoh, Tomoyuki Uchida y Takayoshi Shoudai. "Algorithm Using Expanded LZ Compression Scheme for Compressing Tree Structured Data". En Lecture Notes in Electrical Engineering, 333–46. Dordrecht: Springer Netherlands, 2009. http://dx.doi.org/10.1007/978-90-481-3517-2_26.

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Lamparter, Bernd y Wolfgang Effelsberg. "eXtended color cell compression — A runtime-efficient compression scheme for software video". En Lecture Notes in Computer Science, 181–90. Berlin, Heidelberg: Springer Berlin Heidelberg, 1994. http://dx.doi.org/10.1007/3-540-58494-3_16.

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Actas de conferencias sobre el tema "Compression scheme"

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Liang, Junhui, Yamei Chen, Hongkui Wang, Hailang Yang y Li Yu. "Secondary Intra Prediction Scheme for HEVC". En 2020 Data Compression Conference (DCC). IEEE, 2020. http://dx.doi.org/10.1109/dcc47342.2020.00068.

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Khalifeh, Ala' y Homayoun Yousefi'zadeh. "A Hybrid Media Transmission Scheme for Wireless VoIP". En 2010 Data Compression Conference. IEEE, 2010. http://dx.doi.org/10.1109/dcc.2010.48.

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Wiseman, Yair. "Compression scheme for RFID equipment". En 2016 IEEE International Conference on Electro Information Technology (EIT). IEEE, 2016. http://dx.doi.org/10.1109/eit.2016.7535270.

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Ding, Yi, Olivier Baudin, Patricia V. Beretta y Remy Prost. "Medically adapted JPEG compression scheme". En Medical Imaging 1995, editado por Yongmin Kim. SPIE, 1995. http://dx.doi.org/10.1117/12.207648.

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Bhaumik, B., G. S. Visweswaran y R. Lakshminarasimhan. "A new test compression scheme". En Proceedings Twelfth International Conference on VLSI Design. (Cat. No.PR00013). IEEE, 1999. http://dx.doi.org/10.1109/icvd.1999.745131.

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Hanus, Pavol, Janis Dingel, Georg Chalkidis y Joachim Hagenauer. "Source Coding Scheme for Multiple Sequence Alignments". En 2009 Data Compression Conference (DCC). IEEE, 2009. http://dx.doi.org/10.1109/dcc.2009.64.

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Puchala, Dariusz, Kamil Stokfiszewski y Mykhaylo Yatsymirskyy. "Encryption Before Compression Coding Scheme for JPEG Image Compression Standard". En 2020 Data Compression Conference (DCC). IEEE, 2020. http://dx.doi.org/10.1109/dcc47342.2020.00039.

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Abedini, Navid, Sunil P. Khatri y Serap A. Savari. "A SAT-Based Scheme to Determine Optimal Fix-Free Codes". En 2010 Data Compression Conference. IEEE, 2010. http://dx.doi.org/10.1109/dcc.2010.22.

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Bursalioglu, O. Y. y G. Caire. "A Flexible Multiple Description Coding Scheme Based on Rateless Codes". En 2010 Data Compression Conference. IEEE, 2010. http://dx.doi.org/10.1109/dcc.2010.32.

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Auli-Llinas, Francesc, Michael W. Marcellin, Victor Sanchez, Joan Serra-Sagrista, Joan Bartrina-Rapesta y Ian Blanes. "Coding Scheme for the Transmission of Satellite Imagery". En 2016 Data Compression Conference (DCC). IEEE, 2016. http://dx.doi.org/10.1109/dcc.2016.29.

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Informes sobre el tema "Compression scheme"

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Wu, Kesheng, Ekow J. Otoo y Arie Shoshani. An efficient compression scheme for bitmap indices. Office of Scientific and Technical Information (OSTI), abril de 2004. http://dx.doi.org/10.2172/841308.

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Kidner, R. E. Real-time data compression using a fixed Huffman encoding scheme. Office of Scientific and Technical Information (OSTI), enero de 1995. http://dx.doi.org/10.2172/29404.

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Boynton, P. A. y C. Fenimore. Characterization of projection systems for the MPEG-4 digital cinema compression scheme evaluation. Gaithersburg, MD: National Institute of Standards and Technology, 2001. http://dx.doi.org/10.6028/nist.ir.6792.

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Sun, Yipeng. Preliminary Study on Two Possible Bunch Compression Schemes at NLCTA. Office of Scientific and Technical Information (OSTI), agosto de 2011. http://dx.doi.org/10.2172/1024170.

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Murray, Trevor y Timothy Jacobs. PR-457-16200-R01 Control of Vented Methane Emissions from Integral Compressor Engines. Chantilly, Virginia: Pipeline Research Council International, Inc. (PRCI), abril de 2018. http://dx.doi.org/10.55274/r0011475.

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At natural gas pipeline compressor stations, methane emissions from compressor and engine crankcases are often vented directly into the atmosphere. There may be advantages to capturing these emissions and using them to offset fuel usage and / or decrease the overall carbon footprint of such a typical compressor station. This study evaluates the feasibility of directing such captured emissions into the intake of the compressor engine and subsequently combusting the methane emissions into carbon dioxide and water. Although seemingly an obvious or trivial solution, there are in fact several challenges and issues that must be considered to evaluate if such a scheme is a reasonable course of action for compressor station methane emissions reduction. The study relies on both extensive literature review and model-based engine simulations to determine the feasibility of rebreathing crankcase gases in pursuit of reducing compressor station methane emissions. The conclusions of the study are limited to the crankcase vent rebreathing into the air intake of large bore, natural gas, 2-stroke engines. The model-based engine simulations require detailed physical geometry of the subject engines as well as knowledge of basic engine operating parameters (e.g., fuel flow, air flow, and fuel composition). The simulation is based on the experimental facility located at Colorado State University, which is a 4-cylinder Cooper-Bessemer GMV-4. One of the important parameters needing to be known is the gas composition of both compressor and engine crankcases. It is extremely difficult to determine the composition of the engine crankcase gases, since the composition depends on a large variety of parameters. For this study, the gases from the compressor crankcase are modeled as methane (i.e., pipeline gas), and the gases from the engine crankcase are modeled as products of combustion with two different levels methane concentration (1500 ppm and 3000 ppm). A sensitivity analysis is performed, and the observed pressure traces from the model-based engine simulation show that the engine performance is not affected by the addition of rebreathed gases. This insensitivity mainly results from the very small rebreathed flow rates compared to the air intake, and the adjustments made on engine parameters, boost pressure and fuel injection rate, to keep trapped equivalence ratio (TER) and the energy delivery rate the same.

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Hedrick, Jacob y Timothy Jacobs. PR-457-14201-R02 Variable NG Composition Effects in LB 2S Compressor Engines Phase I Engine Response. Chantilly, Virginia: Pipeline Research Council International, Inc. (PRCI), agosto de 2015. http://dx.doi.org/10.55274/r0010997.

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This is the final report summarizing work completed during the first phase of the PRCI study on large bore two stroke lean burn integral compressor engine response to variable natural gas compositions for the purposes of engine control development. Accomplished tasks include the completion of a detailed literature review covering the research topic, a parametric study of laminar flame speeds and ignition delays for binary methane and ethane mixtures up to 30%, and a GT-Power engine model of the Colorado State GMV-4 research engine with associated validation data from CSU�s variable ethane effects study. The chemistry of the combustion reaction is crucial to accurate modeling; laminar flame speeds and ignition delays as function of composition were determined from the solutions to published chemical kinetics mechanisms GRI-Mech3.0 and Saudi Aramco Mech1.3, respectively. The Wiebe coefficients correlated to variations in ethane composition and spark timing were regressed from the crank angle resolved heat release rates. The Wiebe coefficients are the most significant achievement of this phase of the project, since they quantify the heat release as a function of composition. At this time, the Wiebe parameters only reflect the relative changes in the model since certain aspect of the models geometry are pending resolution. Future phases of the project could use the developed GT-Power model and Wiebe coefficients for development of control schemes that maintain emissions, speed and torque limits, and maximize thermal efficiency during a variable fuel composition event.

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Hedrick y Jacobs. PR-457-14201-R01 Variable Natural Gas - Composition Effects and Control Methods for Two-Stroke Engines. Chantilly, Virginia: Pipeline Research Council International, Inc. (PRCI), junio de 2015. http://dx.doi.org/10.55274/r0010027.

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Literature is reviewed for the impacts of variable natural gas composition on two-stroke lean burn pipeline compressor engines. Information gathered for these engines can be simplified for development of control algorithms in four-stroke and richer burning engines. Data shows that geospatial, geological, and transient hydraulic effects cause composition variations that adversely affect engine emissions, efficiency, rated performance, and operational safety considering auto-ignition effects. In order to compensate for these changes in composition, better engine control schemes can help meet desired performance goals. For specific gas compositions combusting at a fixed air-fuel ratio, the laminar flame speed, adiabatic flame temperature, and ignition delay relate to and allow the prediction of the mixture�s reactivity, thermal availability, and auto-ignition tendency. Predicting changes in these combustion parameters, as caused by changes in fuel composition, is essential to the success of control development for variable composition engine operation. In addition to addressing the associated combustion effects resulting from variable fuel composition, an overview of sensor technologies is presented for use in control applications.

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Skelly, Andrea C., Eric Chang, Jessica Bordley, Erika D. Brodt, Shelley Selph, Rongwei Fu, Rebecca Holmes et al. Radiation Therapy for Metastatic Bone Disease: Effectiveness and Harms. Agency for Healthcare Research and Quality (AHRQ), agosto de 2023. http://dx.doi.org/10.23970/ahrqepccer265.

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Objectives. To evaluate the comparative effectiveness and harms of external beam radiation therapy (EBRT) for palliative treatment of metastatic bone disease (MBD). Data sources. Four electronic databases from 1985 to January 30, 2023; a targeted search for re-irradiation through January 30, 2023; reference lists; and a Federal Register notice. Review methods. Using predefined criteria and dual review, we selected randomized controlled trials (RCTs) and nonrandomized studies of interventions (NRSIs) comparing dose-fractionation schemes and EBRT delivery techniques (for initial radiation and re-irradiation, i.e., retreatment for recurrent or persistent pain) and EBRT alone versus in combination with other palliative treatments. Study risk of bias was assessed using predefined criteria. Strength of evidence (SOE) was assessed for the primary outcomes of pain, function, spinal cord compression relief, quality of life, and harms. Results. We included 53 RCTs and 31 NRSIs; most were fair quality. In patients receiving initial radiation for MBD there was a small increase in the likelihood of overall pain response (improved pain measures with stable or decreased analgesic use) for multiple fraction (MF) EBRT versus single fraction (SF) EBRT up to 4 weeks post-radiation therapy (SOE: moderate) and for higher dose (6 or 8 Gy) SF EBRT versus lower dose (4 Gy) SF EBRT up to 52 weeks post-radiation therapy (SOE: low). SF and MF EBRT did not differ at later followup (SOE: moderate) nor did comparisons of MF EBRT dose/fractions (SOE: moderate ≤12 weeks; low >12 weeks). Re-irradiation was more common with SF versus MF EBRT. Stereotactic body radiation therapy (SBRT) (SF or MF) was associated with a slightly higher (up to 20 weeks, SOE: low) and moderately higher (30 weeks; SOE: moderate) likelihood of overall pain response versus MF EBRT. For re-irradiation, SF and MF SBRT had a similar likelihood of overall pain response, as did SF versus MF EBRT (SOE: low for all). Harms may be similar across dose/fraction schemes and techniques; serious harms were rare. Comparative effectiveness evidence for EBRT was sparse. Conclusions. In patients with uncomplicated MBD receiving initial palliative radiotherapy, the likelihood of overall pain response for SF and MF EBRT is probably similar, particularly after 4 weeks; re-irradiation was more common with SF-EBRT. SF and MF SBRT may provide slightly greater likelihood of overall pain response versus MF EBRT; evidence is limited. SF and MF EBRT may have similar likelihoods of overall pain response in patients receiving re-irradiation. High-quality evidence comparing SBRT with EBRT is needed in populations with complicated and uncomplicated MBD, as is research on effectiveness of EBRT versus other treatments. Update: An addendum is located at the end of the main report, before the appendixes.

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