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웨이브릿 영역에서 영역분류를 이용한 다분광 화상데이타의 효율적인 압축 알고리듬
김영춘,박경남,반성원,이건일,김경규,석정엽 경북대학교 전자기술연구소 2001 電子技術硏究誌 Vol.22 No.1
In this paper, we proposed multispectral image compression method using CIP (classified inter-channel prediction) and SVQ (selective vector quantization) in wavelet domain. First, multispectral image is wavelet transformed and classified into one of three classes considering reflection characteristics of the subband with the lowest resolution. Then, for a reference channel which has the highest correlation and the same resolution with other channels, the variable VQ is performed in the classified intra-channel to remove spatial redundancy, For other channels, the CIP is performed to remove spectral redundancy. Finally, the prediction error is reduced by performing SVQ. Experiments are carried out on a multispectral image. The results show that the proposed method reduce the bit rate at higher reconstructed image quality and improve the compression efficiency compared to conventional methods.