Abstract

Info

Title:: An embedded image coding algorithm based on discrete cosine transform

Author(s):: CHEN Xin1; YOU Minjuan2; CUI Yijun1; ZHANG Yong1; WANG Shigang1; 1. School of Radiology, Shandong First Medical University (Shandong Academy of Medical Sciences), Taian 271016, China 2. Shandong Medicine Technician College, Taian 271016, China

Keywords:: Keywords: image embedded coding discrete cosine transform root-mean-square error peak signal noise ratio

Abstract:: Abstract: This paper designs an embedded image coding algorithm based on discrete cosine transform. The coding process is to transform the image with discrete cosine transform firstly, and then to scan the cosine coefficient in the transform domain in a specific scanning order so that the positions of each coefficient can be well determined. Secondly, in order to represent the cosine coefficient in the transform domain with fewer coding bits, the scanned coefficient should be quantified. The algorithm can end the coding at any time according to the requirements of the target bits or degree of distortion, and can approximately restore the original image. Moreover, with the reduction of compression ratio and the increase of transmitted data volume, both the subjective quality and the objective indicators RMSE and PSNR are greatly improved.