Fractal coding of wavelet image based on human vision contrast-masking effect

Hai Wei; Lansun Shen

doi:10.1117/12.387192

2 June 2000 Fractal coding of wavelet image based on human vision contrast-masking effect

Hai Wei, Lansun Shen

Proceedings Volume 3959, Human Vision and Electronic Imaging V; (2000) https://doi.org/10.1117/12.387192
Event: Electronic Imaging, 2000, San Jose, CA, United States

Abstract

In this paper, a fractal-based compression approach of wavelet image is presented. The scheme tries to make full use of the sensitivity features of the human visual system. With the wavelet-based multi-resolution representation of image, detail vectors of each high frequency sub-image are constructed in accordance with its spatial orientation in order to grasp the edge information to which human observer is sensitive. Then a multi-level selection algorithm based on human vision's contrast masking effect is proposed to make the decision whether a detail vector is coded or not. Those vectors below the contrast threshold are discarded without introducing visual artifacts because of the ignorance of human vision. As for the redundancy of the retained vectors, different fractal- based methods are employed to decrease the correlation in single sub-image and between the different resolution sub- images with the same orientation. Experimental results suggest the efficiency of the proposed scheme. With the standard test image, our approach outperforms the EZW algorithm and the JPEG method.

Citation Download Citation

Hai Wei and Lansun Shen "Fractal coding of wavelet image based on human vision contrast-masking effect", Proc. SPIE 3959, Human Vision and Electronic Imaging V, (2 June 2000); https://doi.org/10.1117/12.387192

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