A New Hybrid JPEG Symbol Reduction Image Compression Technique

摘要

The JPEG standard technique involves three process mapping reduces interpixel redundancy, quantization, which is lossy process and entropy encoding, which is considered lossless process. Lossy JPEG compression is commonly used image compression technique. In the present paper a new hybrid technique has been introduced by combining the JPEG algorithm and Symbol Reduction Huffman technique for achieving more compression ratio .In the symbols reduction method , the number of symbols are reduced by combining together to form a new symbol. As a result of this method the number of Huffman code to be generated also reduced. It is simple, fast and easy to implement. The result shows that the performance of standard JPEG technique can be improved by proposed method. This new hybrid approach achieves about 20% more compression ratio than the Standard JPEG.