A new hybrid DWT-SVD image-coding system for color images

Authors:
Humberto Ochoa;K. R. Rao
Affiliations:
University of Texas at Arlington, Arlington, TX and Universidad Autónoma de Cd., Juárez/PROMEP, Chihuahua, Mexico;University of Texas at Arlington, Arlington, TX
Venue:
ISCGAV'05 Proceedings of the 5th WSEAS International Conference on Signal Processing, Computational Geometry & Artificial Vision
Year:
2005

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Abstract

In this paper, we propose the HDWTSVD system to encode color images. Before encoding, 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. A criterion based on the average standard deviation of 8×8 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 algorithm.