Improving Quality of Medical Image Reconstruction Using Wavelet Based Modified SPIHT Coding Technique
IOSR Journal of Dental and Medical Sciences · 2013
In this paper, we present an improved technique to the Set Partitioning in Hierarchical Trees (SPIHT) based image compression.These modification and the preprocessing techniques provide significantly better quality reconstruction at the decoder with little additional computational complexity.Firstly, we proposed a pre-processing scheme, by 2-D arrangement for wavelet coefficients.Secondly, rearranging the order of the encoded output bit stream by memory optimization at the algorithmic three continuosly growing linked lists levels and a low bit rate image coder.As far as objective quality assessment of the reconstructed image is concerned, we have compared our proposed results with popular Average Difference (AD), Structural Similarity (SSIM) Index in Image Space, Peak Signal to Noise Ratio (PSNR) and Compression Ratio (CR).These metrics show that our proposed work is an improvement over the original one.