Recently, ways to obtain a new generation of image-coding techniques have been proposed. The incorporation of the human visual system (HVS) models and tools of the image analysis, such as segmentation, are two definin...
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Recently, ways to obtain a new generation of image-coding techniques have been proposed. The incorporation of the human visual system (HVS) models and tools of the image analysis, such as segmentation, are two defining features of these techniques. In this paper, a new image coding technique is presented which utilizes a human visual system model and a image analysis criteria together with the technique of projection onto convex sets (POCS). The human visual system model is used to determine the most probable perceptual information of an image and the removal of irrelevant information. The projection onto convex sets operation is used as a restoration technique aimed at correcting the degradations caused by the conventional coders in the transmitter part of the channel. And finally, the image analysis based technique is used as an interpolator in order to predict the unknown regions of the received image. This new technique can be used in single frame image coding applications to obtain acceptable images at extremely high compression rates.
image understanding requires the use of specifications of object structure and appearance in terms of extractable image properties. A description is given of experimentation with a schemata-based approach to visual in...
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ISBN:
(纸本)0818606916
image understanding requires the use of specifications of object structure and appearance in terms of extractable image properties. A description is given of experimentation with a schemata-based approach to visual interpretation which requires the construction of a recognition network that is subsequently coded in the programming language OCCAM to obtain a full expression of the parallelism inherent in the interpretation process.
A method which combines vector quantization (VQ) and orthogonal transform coding schemes is presented. The use of these two techniques in image coding allows efficient bit-rate reduction (about 8-10) with an original-...
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A method which combines vector quantization (VQ) and orthogonal transform coding schemes is presented. The use of these two techniques in image coding allows efficient bit-rate reduction (about 8-10) with an original-like reconstruction quality and easy introduction of visual properties in both classification procedure and codebook design. Recent work, including a classification algorithm and transformed coefficients coding, is presented. image sequence coding using VQ is then discussed, and some strategies for codebook refreshment are proposed. 7 refs.
An approach to image coding is presented that is based on the theory of fractal geometry. The idea is to traverse the entire data string utilizing a fixed length 'yardstick'. The coding is achieved by transmit...
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An approach to image coding is presented that is based on the theory of fractal geometry. The idea is to traverse the entire data string utilizing a fixed length 'yardstick'. The coding is achieved by transmitting only the sign bit (to distinguish between the ascent and the descent) and the horizontal distance covered by the 'yardstick'. All data values are estimated at the receivers site, on the basis of this information. The approach can be utilized for classification of the image complexity and can be used directly for the image compression. The tradeoff between the resolution and quantization errors is easily controlled and a good utilization of human visual characteristics is achieved. Even at the present preliminary stage, excellent quality images have been obtained with as few as 0. 5 b/pel.
作者：
Martinex, K.Pearson, D.E.Univ of Essex
Dep of Electrical Engineering Science Colchester Engl Univ of Essex Dep of Electrical Engineering Science Colchester Engl
Consideration is given to the trade-off between algorithmic complexity and processing speed in primitive extraction for low data-rate visual communication. Initial experiments with serially-implemented algorithms on a...
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ISBN:
(纸本)0903748592
Consideration is given to the trade-off between algorithmic complexity and processing speed in primitive extraction for low data-rate visual communication. Initial experiments with serially-implemented algorithms on an MC68000 processor indicated the need for a high degree of parallelism in order to meet the requirements of real-time, moving-picture data rates. However, insight gained by trials on CLIP4, which typically showed speed gains of 40%, points to window-based architectures implemented using look-up tables.
The bandwidth compression of images through the use of a transform source encoding algorithm is described in general terms. The key element of the algorithm, the quantization procedure, is then described in detail. Th...
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The bandwidth compression of images through the use of a transform source encoding algorithm is described in general terms. The key element of the algorithm, the quantization procedure, is then described in detail. The development of optimal quantizers with an entropy constraint and with a distortion criterion (either mean square error or visual) is then described. Finally, the use of a different linear quantizer for each DCT frequency coefficient is presented in detail.
The following topics are dealt with: expert systems;computer vision;control;biocybernetics;communications, speech, and signal processing;fuzzy information;visual system;pattern recognition;identification and estimatio...
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The following topics are dealt with: expert systems;computer vision;control;biocybernetics;communications, speech, and signal processing;fuzzy information;visual system;pattern recognition;identification and estimation;systems engineering;decision-making;large-scale systems;adaptive and learning systems;robotics;simulation and modeling;management;imageprocessing;man-machine systems;computer systems;database systems;risk and fault analysis;public systems and policy analysis;remote sensing;energy systems;socioeconomic systems and technologies for developing countries;international stability;and optimization and systems method. 360 papers were presented, of which 276 are published in full in the present proceedings, and 13 as abstracts only. *
Innovations in raster graphics technology have led to the development of tunrkey computer graphics systems that combine interactive graphics and digital imageprocessing. These interactive picture processing systems p...
Innovations in raster graphics technology have led to the development of tunrkey computer graphics systems that combine interactive graphics and digital imageprocessing. These interactive picture processing systems provide hardware and software necessary for input, creation, manipulation, storage and output of visualimages. Interactive picture processing systems have evolved from traditional visualcommunications media, such as painting, paper, pencils, printing, photography, mechanical typesetting, film, and video. This revolution has changed the emphasis of computer graphics from numbers-intensive to art-intensive devices.
This book constitutes the refereed proceedings of the 16th conference on image and Graphics Technologies and Applications, IGTA 2021, held in Beijing, China in June, 2021. The 21 papers presented were carefully r...
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ISBN:
(数字)9789811671890
ISBN:
(纸本)9789811671883
This book constitutes the refereed proceedings of the 16th conference on image and Graphics Technologies and Applications, IGTA 2021, held in Beijing, China in June, 2021. The 21 papers presented were carefully reviewed and selected from 86 submissions. They provide a forum for sharing progresses in the areas of imageprocessing technology; image analysis and understanding; computer vision and pattern recognition; big data mining, computer graphics and VR, as well as image technology applications. The volume contains the following thematic blocks: imageprocessing and enhancement techniques (image information acquisition, image/video coding, image/video transmission, image/video storage, compression, completion, dehazing, reconstruction and display, etc.); biometric identification techniques (biometric identification and authentication techniques including face, fingerprint, iris and palm-print, etc.); machine vision and 3D reconstruction (visual information acquisition, camera calibration, stereo vision, 3D reconstruction, and applications of machine vision in industrial inspection, etc.); image/video big data analysis and understanding (object detection and recognition, image/video retrieval, image segmentation, matching, analysis and understanding); computer graphics (modeling, rendering, algorithm simplification and acceleration techniques, realistic scene generation, 3D reconstruction algorithm, system and application, etc.); virtual reality and human-computer interaction (virtual scene generation techniques, tracing and positioning techniques for large-scale space, augmented reality techniques, human-computer interaction techniques based on computer vision, etc.); applications of image and graphics (image/video processing and transmission, biomedical engineering applications, information security, digital watermarking, text processing and transmission, remote sensing, telemetering, etc.); other research works and surveys related to the applications of image an
We would like to welcome you to the proceedings of CCIW 2009, the Computational Color Imaging Workshop, held in Saint-Etienne, France, March 26–27, 2009. This, the second CCIW, was organized by the University Jean Mo...
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ISBN:
(数字)9783642032653
ISBN:
(纸本)9783642032646
We would like to welcome you to the proceedings of CCIW 2009, the Computational Color Imaging Workshop, held in Saint-Etienne, France, March 26–27, 2009. This, the second CCIW, was organized by the University Jean Monnet and the - boratoire Hubert Curien UMR 5516 (Saint-Etienne, France) with the endorsement of the International Association for Pattern Recognition (IAPR), the French Association for Pattern Recognition and Interpretation (AFRIF) affiliated with IAPR, and the "Groupe Français de l'imagerie Numérique Couleur" (GFINC). The first CCIW was organized in 2007 in Modena, Italy, with the endorsement of IAPR. This workshop was held along with the International conference on image Analysis and processing (ICIAP), the main conference on imageprocessing and pattern recognition organized every two years by the Group of Italian Researchers on Pattern Recognition (GIRPR) affiliated with the International Association for Pattern Recognition (IAPR). Our first goal, since we began the planning of the workshop, was to bring together engineers and scientists from various imaging companies and from technical com- nities all over the world to discuss diverse aspects of their latest work, ranging from theoretical developments to practical applications in the field of color imaging, color imageprocessing and analysis. The workshop was therefore intended for researchers and practitioners in the digital imaging, multimedia, visualcommunications, computer vision, and consumer electronic industry, who are interested in the fundamentals of color imageprocessing and its emerging applications.
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