A modified HDWTSVD image coding system
نویسندگان
چکیده
In this paper, we propose a modification of the HDWTSVD algorithm to encode monochromatic images that combines DWT and SVD techniques. At the encoder side, the input image is divided into blocks (tiles) of 64x64 pixels. A criterion based on the average standard deviation of 8x8 subblocks is used to choose DWT or SVD. If the tile exhibits a high average standard deviation, it is compressed by using SVD otherwise by DWT. The Daubechies 9/7 filter bank factored into lifting steps is used for the DWT. The maximum number of levels of subband decomposition for each tile is 3. The proposed algorithm is applied to image coding and its performance is discussed and compared with the HSVDDCT algorithm.
منابع مشابه
A New Coding System for Monochromatic Images Based on Wavelet Transform and Singular Value Decomposition (HDWTSVD)
In this paper the HDWTSVD algorithm to encode monochromatic images is proposed. The algorithm combines DWT and SVD techniques. The input image is divided into tiles of 64x64 pixels. A criterion based on the average standard deviation of 8x8 subblocks is used to choose DWT or SVD. If the tile exhibits a high average standard deviation, it is compressed by using SVD otherwise by DWT. Eigenvalues ...
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