A Novel Method to Compress Still Images Using Golomb Code (GC) in JPEG2000
JPEG2000 is a widely used standard image compression method. It makes use of EBCOT to compress the co-efficients of the Discrete Wavelet co-efficients. The JPEG2000's algorithm is based on Discrete Wavelet Transform (DWT) and the Embedded Block Coding with Optimal Truncation (EBCOT). Golomb codes, a code in which no codeword is also a prefix of some other codeword. The authors propose that the EBCOT can be replaced by Golomb code which gives better result. Image compression helps to reduce the cost of storing, retrieving and transferring across a network. Block Truncation Coding (BTC), Vector Quantization (VQ), Discrete Cosine Transform (DCT) and Discrete Wavelet Transform coding (DWT) are some of the widely used image compression methods.