Self - adapted quadtree image compression method proposed by fisher [ 13 ] in - creases the speed of encoding procedure of the image , heightens the compression ratio , but the quality of the reconstructed image is not good Fisher提出的自適應四叉樹編碼方法加快了圖象編碼的速度,提高了圖象的壓縮比,但是在圖象的重建質量上還存在不足。