DC恢复算法及其在图像压缩编码中的应用  

DC recovering algorithm and its application in the image compression

作　　者：查宣威[1] 岑峰[1] 

机构地区：[1]同济大学电子与信息工程学院,上海201804

出　　处：《微型机与应用》2013年第1期37-39,共3页Microcomputer & Its Applications

基　　金：国家自然科学基金项目(60972035)

摘　　要：DC恢复算法是一种基于离散余弦变换(DCT)的图像恢复算法,其能够应用于图像压缩编码中对DC系数的预测中。该方法利用了块分割图像在相邻块边缘区域的像素依然连续这一特点,利用周边块像素信息选择较为连续的相邻块对DC系数进行预测恢复。实验验证了其能对DC系数的进行更为准确的预测,从而达到提高图像压缩率的目的。A DC recovering algorithm is an image recovering algorithm based on DCT. In this paper, it is applied to the image compression. The pixel values of the block-based image are continuous along the edge of blocks. DC recovering algorithm recovers DC coefficients by choosing the neighboring blocks with more continuous edges. The experimental results prove that DC coefficients are predicted more accurately in the image compression, and the image compression rate is improved.

关 键 词：压缩域 JPEG 离散余弦变换 

分 类 号：TN911[电子电信—通信与信息系统]