Model-based coding is recognized to be a perspective method of low bit-rate image compression method. Due to some merits which cannot be drawn a parallel with ordinary

Edge Model-based Coding is given more and more attention by researchers now. In such method

the ambient region of Edge Model-based whose most of the higher frequency is cut has a smooth gray change in background. The area which was left is about 10 percent of the whole image. In this paper

in order to compress the ambient image by traditional JPEG method

we present a sensitive region filling method by using 8×8 block filled with DC. Thus the blank area which was filled can provide as much DC as possible. At the receiver

the sensitive region is added to the decompressed ambient region. Experiments and data show that the filled image is adapt to be compressed by using JPEG and can get good compression ratio

simultaneously the subjective quality of reconstructed image is also better than that of by using JPEG directly.