研究了基于小波变换的图象编码F在系统地分析了小波变换各子图象的量化噪声和恢复噪声的基础上,\n提出了在给定的比特率下.使系统恢复失真达到最小的优化比特分配方案F指出了在均匀量化时各子图象量化步\n长之间具有成倍的关系F模拟实验证明了该结论.并给出了满意的结果.

Astudy of Image Coding based on Wavelet Transform is made in this paper. On the basis of a systematic analysis of the quantization noises and the reconstruction noises of the sub-images.an optimal bit allocation scheme is presented .which minimizes the system reconstruction distortion at a given bit一rate. When uniform quantizers are used .it is shown that the quantization step of a succeeding level in the wavelet pyramid is a hall of that of its predecessor level. The simulation experiments demonstrate the con- elusion oI this paper and give satisfactory results.