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المؤلفKatebi, S. D.
تاريخ الإتاحة2009-11-25T13:04:58Z
تاريخ النشر1996
اسم المنشورEngineering Journal of Qatar University
الاقتباسEngineering Journal of Qatar University, 1996, Vol. 9, Pages 105-121.
معرّف المصادر الموحدhttp://hdl.handle.net/10576/7907
الملخصA new technique for image data compression based on fuzzy segmentation, classification and properties of sequency ordered Hadamard Transform (HT) is presented. Using a pyramidal data structure, an image is segmented into blocks of variable sizes. The size of each block is determined using a fuzzy procedure depending on the amount of information contained. Regions with low details are divided into blocks of variable size, while regions containing more information are successively segmented into smallest size of 4*4 blocks. Only a small number of more energetic components of HT are used for the coding of the uniform blocks, while a fuzzy edge oriented classifier is designed for the coding of the high-detail blocks. The classifier employs several prototype edge patterns in HT blocks and the fuzzy techniques for recognition of the direction of edges. The low-detail regions are coded with very low bit rate on the expense of small reduction in the visual quality of images, while the coding process for high-detail regions results in an acceptable image quality. Decoded images of high quality are obtained for encoding rates of 1 bit per pixel.
اللغةen
الناشرQatar University
الموضوعEngineering: Research & Technology
العنوانA Hadamard Transform Fuzzy Segmentation And Classification Technique For Image Compression
النوعArticle
الصفحات105-121
رقم المجلد9
dc.accessType Open Access


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