基于整型小波变换和嵌入式零树编码的医学图像压缩

Medical Image Compression Based on Integer Wavelet Transform and Embedded Zero-tree Coding

对给定的医学图像采用基于“提升”算法的整型小波变换 ,对变换后的小波域图像编码。编码时 ,针对医学DICOM标准的数据结构 ,在小波零树编码的基础上 ,根据不同频率子带的小波系数对恢复图像的重要程度进行不同处理。实验证明 ,该方法视觉效果良好 ,实现了医学图像的无损压缩 。

In this paper,we present a compression processing of medical image based on integer wavelet transform and embedded zero-tree coding.By analyzing the feature of medical image,we put forward a coding scheme which take the importance of coefficients in different scales into account.Experimental results show that the method can obtain high human vision and implement the lossless compression of medical image.Besides,the results of the reconstructed images are good.