Block-Wise Image Compression Using Major and Minor Diagonal Pixels

The important role played by the data compression is in reducing the storage space required, and ensuring bandwidth utilization in efficient manner and low transmission delays. Image compression is also a part of data compression. Images contain important data that is to be transmitted or stored. The compression must not degrade the quality of the image, and should be acceptable. This paper presents simple, low complexity image compression algorithm. Algorithm scans the image in a raster san manner in terms of 4X4 blocks. Compression is achieved by the diagonally situated pixels and indices their surrounding pixels of the block. The mages produced by proposed algorithm are high fidelity images at low PSNR values. The results are comparable with standard algorithm results. The reconstructed image quality is better than JPEG images at same PSNR.