Edge enhancement improved SPIHT image coding and decoding method
A technology of image encoding and decoding methods, which is applied in the field of improving SPIHT image encoding and decoding, and can solve problems such as sensitivity, affecting the quality of reconstructed images, and unfavorable subjective quality of decoded images
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[0064] An improved SPIHT image coding and decoding method of edge enhancement, characterized in that it is carried out according to the following steps:
[0065] Step 1. Input the image to be encoded and the target bit rate , let the image size be pixels, and image level wavelet transform;
[0066] Step 2. Put and Each uses 1 byte to transmit to the decoding end, and performs DPCM coding and arithmetic coding on the coefficients of the lowest frequency sub-band, and transmits to the decoding end;
[0067] Step 3. Perform Laplacian high-pass filtering on the lowest frequency sub-band coefficients to find out the maximum amplitude of the absolute value of the high-pass coefficients , to calculate the maximum number of bitplanes ;
[0068] Step 4. According to the highest non-zero bit plane, the lowest frequency coefficient after high-pass filtering is divided into group, if the highest non-zero bit-plane of a certain high-pass coefficient is its ones plane, ,...
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