| By investigating all arithmetic of JPEG2000, using a new fast DWT lifting algorithm which separates the stretch changes steps and lifting steps, realize to reduce operation times of compute' arithmetic. As well as, carrying on simplification of newfilter' coefficient to reduce operates of floating number. Finally, compared with routine arithmetic of JPEG2000, we can draw on a condition: using latter stretches the algorithm can reduce multiplicative operation of 20%~30%, By tool of MATLAB simulate the result of researching, simplification of filter' coefficient can reduce complex of operates which can attain that is high compression rate and steady distortion. And its reconstruction image quality is sufficient at the lose compression of applications. So this compression system is a method that can optimize JPEG2000. |
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