Block Based Prediction with Modified Hierarchical Prediction Image Coding Scheme For Lossless Color Image Compression

Today is world of electronics gadget's which generates voluminous data that includes the various forms of multimedia data. In these data collections images need more space to store the content and need more bandwidth to transmit through network. By using Image compression the size of the image can be reduced which helps in less utilization of memory and transmitted across network with less bandwidth. In this proposed work, first the color image is de-correlated into luminance and chrominance image by using Reversible Color Transforms (RCT) technique. The Modified Hierarchical Prediction (MHP) encodes C-u and C-v of chrominance channel, then they are decomposed into sub images to predict the vertical, horizontal and diagonal pixels for effective image compression. After that luminance image Y is encoded using a technique called Variable Sized Blocks Hierarchical Prediction (VSBHP) coding scheme. Proposed work gives much better result than the existing approach.