基于小波系数带间预测的图象累进传输

Images Progressive Transmission with Inter band Prediction of Wavelet Coefficients

提出了一种基于小波变换的图象累进编码传输方案，利用图象内在的自相似性对幅值较小的小波系数进行带间预测，对幅值较大的系数进行分层估值量化，辅以高效的自适应算术编码，形成按重要性顺序排列的图象编码，在很低的比特率下，重构图象仍可辨认；而在相同的比特率下，重构图象的质量一致优于ＪＰＥＧ标准。

Based on the wavelet transforming an image coding algorithm for progressive transmission is presented.By making use of images inherent self similarity,the inter band prediction of the low amplitude wavelet coefficient and the successive approximation quantization of high amplitude wavelet coefficient are completed.Finally,with the help of the efficient adaptive arithmetic coding the image coding in the order of importance is obtained.The reconstructed images are recognizable at low bit rate and their quality are better than JPEG at any bit rate.