The method of quadtree partition is employed to carry out adaptive separation of the image and then region coding is adopted on the partitioned defined segments.

• 首先采用四叉树分块方法,对图象进行自适应分隔,进而在分割的定义块上采用区域编码;为减小压缩损失,再辅以自适应多阈值的阈值编码。