A modified HDWTSVD image coding system

Authors:
Humberto Ochoa;K. R. Rao
Affiliations:
Universidad Autónoma de Cd. Juárez, Cd. Juárez, Chihuahua, México and University of Texas at Arlington, Arlington, TX;Universidad Autónoma de Cd. Juárez, Cd. Juárez, Chihuahua, México
Venue:
AEE'06 Proceedings of the 5th WSEAS international conference on Applications of electrical engineering
Year:
2006

Citing 3
Cited 0

Fundamentals of digital image processing

Fundamentals of digital image processing
A low bit rate wavelet-based image coder for transmission over hybrid networks

A low bit rate wavelet-based image coder for transmission over hybrid networks
A hybrid DCT-SVD image-coding algorithm

IEEE Transactions on Circuits and Systems for Video Technology

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Abstract

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 64×64 pixels. A criterion based on the average standard deviation of 8×8 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.