Medical Image Compression Using Multiwavelet Transform

With the development of micro electronics and information technology, there are more pixels in unit area of the imaging device. The high resolution images with more pixels can be obtained easily. But the high resolution images have huge data volume. It is difficult to transmit, to process, to store high resolution images. So compressing images is an important technology to reduce the requisite storage space and transmission channel bandwidth. In this paper multiwavelet coding has been proved to be a very effective technique for medical images giving significantly better results. The Discrete Multiwavelet Transform of the image is calculated with GeronimoHardin Massopust (GHM) multiwavelet. The wavelet coefficients are encoded using SPIHT coder. This method yields better compression performance. The quality of the image is assessed by PSNR value, Compression Ratio and Coding times.