Image compression method and device integrating hybrid coding and wordbook coding
A hybrid coding and image compression technology, applied in image communication, digital video signal modification, television, etc., can solve problems such as image layering or inaccurate block classification
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[0101] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0102] Both text / graphics and natural images have their own relatively mature compression methods. At present, H.264 based on the hybrid coding framework is the most effective method for natural video compression, and for text / graphics, Gzip compression based on the LZ (Lempel-Ziv) dictionary coding algorithm is undoubtedly a very effective method, the present embodiment Composite images are compressed using H.264 and Gzip adaptive methods, the specific compression process is as follows Figure 9 shown, including the following steps:
[0103] (1) Divide the image into multiple non-overlapping 16 x 16 macroblocks.
[0104] (2) For each macroblock, use H.264 and Gzip to compress respectively.
[0105] (3) In H.264 and Gzip, the compressed data generated by the method with fewer compressed bits is selected and put into the compressed code stream.
[01...
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