计算机技术与发展Issue(1)：147-149,154,4.DOI:10.3969/j.issn.1673-629X.2016.01.031
基于离散余弦变换的图像压缩编码方法及改进
Improved Image Compression Coding Method Based on Discrete Cosine Transform
摘要
Abstract
Image compression is an important way of image information transfer. The quality of image must be ensured when it is com-pressed. Among kinds of compressing methods,Discrete Cosine Transform (DCT) is the core of most international image compressing standards. As a lossy compression algorithm,DCT can achieve high compression ratio and good visual effect. So the method becomes an important technology of image compression and it has been widely used in the areas such as image compression,especially in the JPEG and the MPEG. The principle of DCT and its applications in image compression are introduced in this paper. Based on comparison of two kinds of image compression based on DCT,an improved image compression method based on DCT is proposed. By choosing coefficient of DCT to control the size of an array of image compression,the new method improves the quality of image restoration. The experiments of MATLAB show that the proposed algorithm improves the PSNR of compressed images and consumes relatively few time.关键词
图像压缩/离散余弦变换/峰值信噪比/阈值Key words
image compression/discrete cosine transform/PSNR/threshold分类
信息技术与安全科学引用本文复制引用
严珍珍,刘建军..基于离散余弦变换的图像压缩编码方法及改进[J].计算机技术与发展,2016,(1):147-149,154,4.基金项目
国家自然科学基金资助项目(11471114,61179027) （11471114,61179027）
