Download or read book Compression et visualisation d images m dicales par segmentation written by Qosai KANAFANI and published by Omniscriptum. This book was released on 2011-07 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ce travail constitue une contribution à déférents niveaux en apportant quelques solutions modestes aux problèmes difficiles de l'imagerie médicale. Le premier aspect considéré est l'amélioration de la qualité de ces images. Des traitements sont alors nécessaires pour faire ressortir les structures utiles à l'aide au diagnostic. Nous avons opté pour la segmentation stochastique basée sur un modèle de mélange qui tient compte de la connaissance a priori du nombre de constituants, donnée souvent connue vu la nature des images analysées. La compression du volume de données 3D est aussi étudiée dans ce travail. Une méthode de compression simple et efficace est proposée et évaluée au moyen de critères de qualité subjective et objective. Les résultats obtenus sont encourageants et montrent encore une fois que la réticence quant à l'utilisation des méthodes de compression avec perte dans le cas des images médicales n'est pas très justifiée. Enfin, l'étape de visualisation du volume de données 3D est abordée. Ici, nous nous sommes contentés de l'existant et nous avons sélectionné parmi les méthodes connues celles qui paraissent adaptées à nos exigences: simplicité, rapidité, efficacité.

Download or read book Compression et visualisation d images m dicales par segmentation written by Qosai͏̈ Kanafani and published by . This book was released on 2003 with total page 125 pages. Available in PDF, EPUB and Kindle. Book excerpt: [Résumé français] Dans cette thèse, nous étudions les images médicales obtenues par IRM et par CT. Le premier aspect considéré est l'amélioration de la qualité de ces images. Et le deuxième aspect est le choix de méthodes de segmentation adaptées aux images médicales. Nous avons opté pour la segmentation stochastique basée sur un modèle de mélange. La compression du volume de donnée 3D est aussi étudiée. Une méthode de compression simple et efficace est proposée et évaluée au moyen de critères de qualité subjective et objective. Les résultats obtenus sont encourageants et montrent encore une fois que la réticence quand à l'utilisation des méthodes de compression avec perte dans le cas des images médicales n'est pas trés justifiée. Il s'agit dans cette thèse de répondre à des besoins spécifiques en apportant des solutions originales qui tiennent compte de l'existant, de la nature des images et de leur usage. Nous avons aussi insisté sur les critères de temps de calcul, de flexibilité et de fiabilité.

Download or read book A Neutrosophic Approach to Digital Images written by Mouhammad Bakro and published by Infinite Study. This book was released on 2020-10-01 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: This research paper presents a neutrosophic mathematical representation of the elements of the digital image by dividing the points of the digital picture matrix into neutrosophic sets (PNS - Picture Neutrosophic Set), and studying the degree of connection between the points of the digital image for us to reach to the connected neutrosophic sets. We have also introduced many mathematical theories and results to calculate the difference and dissimilarity between the neutrosophic sets, which contributes practically in the comparison between digital images and their different uses. Our results help mainly to upgrade and create new neutrosophic algorithms for searching inside images and videos databases.

Download or read book Neutrosophic Sets and Systems An International Journal in Information Science and Engineering Vol 36 2020 written by Florentin Smarandache and published by Infinite Study. This book was released on 2020-10-01 with total page 410 pages. Available in PDF, EPUB and Kindle. Book excerpt: Neutrosophic Sets and Systems (NSS) is an academic journal, published quarterly online and on paper, that has been created for publications of advanced studies in neutrosophy, neutrosophic set, neutrosophic logic, neutrosophic probability, neutrosophic statistics etc. and their applications in any field.

Download or read book Digital Image Compression by Using Edge Based Segmentation written by Chun-Hui Huang and published by . This book was released on 1996 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Neutrosophic Sets and Systems Vol 36 2020 written by Florentin Smarandache and published by Infinite Study. This book was released on with total page 410 pages. Available in PDF, EPUB and Kindle. Book excerpt: “Neutrosophic Sets and Systems” has been created for publications on advanced studies in neutrosophy, neutrosophic set, neutrosophic logic, neutrosophic probability, neutrosophic statistics that started in 1995 and their applications in any field, such as the neutrosophic structures developed in algebra, geometry, topology, etc. Some articles in this issue: n-Refined Neutrosophic Modules, A Neutrosophic Approach to Digital Images, A Novel Method for Neutrosophic Assignment Problem by using Interval-Valued Trapezoidal Neutrosophic Number.

Download or read book Segmentation Based Reversible Image Compression written by Krishna Chaitanya Ratakonda and published by . This book was released on 1996 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Applications of Image Segmentation Techniques for Compression and Medical Image Processing written by 王昱翔 and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Image Segmentation Using Human Visual System Properties with Applications in Image Compression written by Heidi A. Peterson and published by . This book was released on 1990 with total page 229 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: "In order to represent a digital image, a very large number of bits is required. For example, a 512 x 512 pixel, 256 gray level image requires over two million bits. This large number of bits is a substantial drawback when it is neceaary to store or transmit a digital image. Image compression, often referred to as image coding, attempts to reduce the number of bits used to represent an image, while keeping the degradation in the decoded image to a minimum. One approach to image compression is segmentation-based image compression. The image to be compressed is segmented, i.e., the pixels in the image are divided into mutually exclusive spatial regions based on some criteria.

Download or read book Segmentation based Compression of Monochrome and Color Still Images written by Iftekhar Hussain and published by . This book was released on 1995 with total page 314 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Image Segmentation and Compression Using the Tree of Shapes of an Image written by Laura Igual Muñoz and published by . This book was released on 2005 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Image Segmentation for Object Based Image Compression written by Junaid Ahmed and published by . This book was released on 2000 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Compound Image Segmentation and Compression for Secure Transmission written by D. Maheswari Maheshlenin and published by LAP Lambert Academic Publishing. This book was released on 2012-07 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt: Increase in the use of images in the continuous expansion of multimedia applications has increased the demand for efficient techniques that can store and transmit visual information. This demand has made image compression a vital factor. This work proposes compression techniques for compound images. For this purpose, the primary goal was set as "to develop compression schemes that can compress color compound images quickly, which can reduce the compression rate, while maintaining a good level of visual quality in a secure fashion." Here two types of segmentation techniques (i) layer-based segmentation and (ii) block-based segmentation are analyzed and two hybrid models are proposed. The first hybrid model combines histogram-threshold block-based technique with wavelets and the second model combines layer and block-based techniques for efficient compression. Security to image content is provided in three ways, namely, Block Transformation Coding (BTC), XML transformation and conversion for text block and Encryption of image blocks. Experiments are conducted with the traditional compressors which prove that the proposed models give better results.

Download or read book Image Compression by Adaptive Rectangular Segmentation written by Christopher L. Cahill and published by . This book was released on 1992 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Segmentation based Image Compression written by Oh-Jin Kwon and published by . This book was released on 1992 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: "A segmentation-based image coding technique is described here. Both uniform and textured region extraction algorithms are used for segmentation. Textured regions are reconstructed using 2-D noncausal Gaussian-Markov random field models. Uniform regions are reconstructed using polynomial expansions. An arithmetic coder is used for coding the boundaries of regions. Reasonable quality images are obtained at a compression factor of 82:1."

Download or read book Adaptive Digital Image Compression Based on Segmentation and Block Classification microform written by Mahmoud R. El-Sakka and published by National Library of Canada = Bibliothèque nationale du Canada. This book was released on 1997 with total page 286 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book DCT Image Compression with Adaptive Block size Segmentation written by Chou Hong Hong and published by . This book was released on 1996 with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt: