Postprocessing of Low Bit-Rate Wavelet-Based Image Coding Using Multiscale Edge Characterization
نویسندگان
چکیده
In this paper, we propose a new postprocessing method for low bit-rate wavelet-based image coding which uses the technique of wavelet modulus maximum representation (WMMR). The edge degradation from wavelet-based coding is discussed under the overcomplete wavelet expansion, and interpreted as the distortion of wavelet modulus maxima, i.e. magnitude decays. Based on the empirical analysis and experimental results, we develop a set of compensation functions to restore the distorted wavelet modulus maxima of a coded image. Therefore, we can reconstruct the coded image using the WMMR with improved image quality in terms of both subjective perception and image fidelity (PSNR).
منابع مشابه
Post-Processing for Low Bit-Rate Wavelet-Based Image Coding Using Multiscale Edge Characterization
In this paper, we propose a new postprocessing method for low bit-rate wavelet-based image coding which uses the technique of wavelet modulus maximum representation (WMMR). The edge degradation from wavelet-based coding is discussed under the overcomplete wavelet expansion, and interpreted as the distortion of wavelet modulus maxima, i.e., magnitude decays. Based on the empirical analysis and e...
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