Color image compression using bit reduction and Burrows Wheeler transform

Abstract

In this paper a new image compression technique for color images using bit reduction and Burrows Wheeler transform is proposed. This method adopts the advantages in BWT based text compression to compressing images also. A bit encoding schemes that select blocks of pixel values from the source image and convert those pixel values in to equivalent alphabets (A-Z, a-z), thereby we acquire a new encoded text file consisting of only the alphabets. The BWT based compression method can be now applied to the above said text file to compress it. To increase the compression rate some variant methods in the encoding phase are also proposed in this paper. The experimental results have shown a significant improvement in the compression ratios compared to other techniques.