Title :
A hybrid DWT-SVD image-coding system (HDWTSVD)
Author :
Ochoa, Humberto ; Rao, K.R.
Author_Institution :
Univ. Autonoma de Ciudad Juarez, Chihuahua
Abstract :
In this paper, the authors proposed the HDWTSVD system to encode both monochromatic and color images. Before encoding the color images, the color components (RGB) are transformed into YCbCr. Cb and Cr components are downsampled by a factor of two, both horizontally and vertically, before sending them through the encoder. If the input is a monochromatic image, only one frame (luminance) is encoded. A criterion based on the average standard deviation of 8times8 subblocks of the Y component is used to choose DWT or SVD for all the components. Standard test images are compressed based on the proposed system
Keywords :
discrete wavelet transforms; image coding; singular value decomposition; vector quantisation; color images; discrete wavelet transform; encoding; hybrid DWT-SVD; image coding system; monochromatic images; singular value decomposition; vector quantization; Bandwidth; Color; Data compression; Discrete wavelet transforms; Filter bank; Image coding; Image storage; Signal processing algorithms; Singular value decomposition; Vector quantization; Discrete wavelet transform; HCRIOT; singular value decomposition; vector quantization;
Conference_Titel :
Circuits and Systems, 2003 IEEE 46th Midwest Symposium on
Conference_Location :
Cairo
Print_ISBN :
0-7803-8294-3
DOI :
10.1109/MWSCAS.2003.1562341
