Image compression using improvised column based Thepade's Cosine Error Vector Rotation (TCEVR) Codebook generation in Vector Quantization

Abstract

Image compression is inevitable now a days as multimedia based data is increasing at faster rate. Vector Quantization plays vital role in Codebook generation. Codebook is the soul of Vector Quantization. There are several methods to generate Codebook but the recent one is Thepade's Cosine Error Vector Rotation (TCEVR), which is proven better than others (KEVR, KEVRW, LBG). Paper proposes novel Column based error Vector Rotation for TCEVR. The proposed column based improvisation in TCEVR is tested with a test bed of 18 images for image compression. Experimentation result show that the proposed TCEVR Codebook generation in VQ for Image compression is showing improvisation over earlier proposed Row based TCEVR. As observed from lower average Euclidean distance between the original and regenerated images for various Codebook sizes.