A PERFORMANCE STUDY OF TWO JPEG COMPRESSION APPROACHES
Abstract
As technology continues to advance, and the transition into the digital age, we find ourselves dealing with an ever-expanding volume of information, often leading to challenges in management. Consequently, there is a growing need to store and retrieve digital information in a manner that is both efficient and effective. This paper discusses jpeg image compression techniques; and presents comparison between two modifications of jpeg image compression techniques. Both of two modifications rely on applying DCT to the divided blocks of the image. They differ in the way of selecting the coefficients resulted from DCT to be quantized in order to remove redundancy. The quality of the compressed images is evaluated using Peak Signal to Noise Ratio (PSNR), Weighted Peak Signal to Noise Ratio (WPSNR) and spatial frequency measurement (SFM).
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