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Recently the wavelet-based contourlet transform (WBCT) is adopted for image coding because it matches better image textures of different orientations. However, its computational complexity is very high. In this paper, we propose three tools to enhance the WBCT coding scheme, in particular, on reducing its computational complexity. First, we propose short-length 2-D filters for directional transform...
In this paper, we propose two enhanced elements on the wavelet-based contourlet transform (WBCT) image coding scheme. A short-length 2-D non-separable directional filter bank is designed for significantly reducing the calculation. New zero coding context models are designed to improve coding efficiency. Experiments show that the proposed compression scheme produces better visual quality images, particularly,...
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