Compression and Reconstruction of JPEG Image and Its Simulation

Many images are compressed by JPEG standard based on Discrete Cosine Transform (DCT). JPEG is suitable for color image as well as the gray image. Different compression ratios result in different image qualities which are evaluated by the peak signal to noise ratio (PSNR). This paper Illustrate the above problems through a serial of experiments. In addition, the experiments show that true-color image is more suitable for JPEG than gray image. http://www.sjie.org/paperInfo.aspx?ID=282