Hybrid compression scheme using precoding block and fast stationary wavelet transformation

摘要

In this paper a hybrid compression using precoding block and Fast Stationary Wavelet Transformation have been proposed for standard and compound images. The proposed method is the extension of transformation based compression process. It has two operations 1. precoding, 2. transformation. The first process is precoding in which the original image is divided into (nxn) non overlapping blocks then each block is combined with the precoding block, which have different level of gray values. When the original pixel value is nearer to the precoding block element, then the original pixel value is rounded near the precoding element data. Secondly the precoded image data has been transformed by FSWT (Fast Stationary Wavelet Transformation) and got the energy compaction. The proposed technique is dually reduce the size of the information by precoding block and transformation. So it is very much suitable for compressing all types of images.