Fractal Image Compression Coding Based on ROI
Wu Hong · Jisuanji fangzhen · 2006
Fractal image compression is concerned more and more by people because of having high compression ratio, but blocking effects is very obvious under the condition of high compression ratio, which affects the quality of the decoded image to a large extent. To solve this problem, using for reference the concept of ROI brought forward in JPEG2000,a method was put forward that combined the image coding based on region of interest(ROI) with fractal image compression coding, which made the fidelity of ROI higher than that of background' s( BG). The method solved preferably the conflict between image compression ratio and the quality of reconstructed image. The experiments prove that the method reduces the coding time greatly and that the quality of the decoded image is greatly improved, moreover, that the total coding performance is higher than JPEG coding, at the same time of high compression ratio.