Design and Implementation of Strip based Modified SPIHT algorithm for Compression and Decompression using Verilog
Abstract This work presents the implementation of modified SPIHT for the Compression and Decompression of the images. Even though SPIHT is known for its efficiency, it has got some memory limitations. In order to overcome that, the modified SPIHT will be used in this work that utilizes only a single list instead of three lists and the passes like sorting and refinement will be considered as a single pass. Initially images are first compressed using Haar wavelet transform where the whole image is divided into sub bands. After completing the Wavelet transform another entropy coding technique known as modified SPIHT has been applied to the resultant image to obtain the promising range in the values of factors such as Efficiency, Compression Ratio and PSNR which are the essential and imperative factors for the evaluation of performance. Since the image can't be taken directly as the input, it is first converted into text file and vice versa using MATLAB code.