基于二代小波变换的图像目标编码方法

研究了二代小波用于任意形状图像目标变换编码的可行性。文中采用一种需要对目标作适当的延拓后再作变换的方法，另一种则在修改二代小波提升算法的基础上获得一种不需延拓的形状自适应变换方法。实验结果表明，这二种方法与Katata使用的一代小波的方法相比，有更好的压缩性能。

CODING OF IMAGE OBJECTS BASED ON WAVELET TRANSFORM USING LIFTING SCHEME

Wavelet lifting scheme was applied to the transform coding of arbitrarily shaped image objects. There are two approaches: one needs the extrapolation of the image object and the other is a shape adopted algorithm by modifying the lifting scheme. The experiment result shows that the image compression performance of the two approaches is better than Katata's approach which uses the classical wavelet transform.