摘要
为减少图像传输的数据量,满足信道带宽的要求,在图像发送端以块为单位对图像进行划分,利用离散余弦变换(DCT),按照一定的规则主动丢弃部分块的低频分量,而在图像接收端通过图像重建技术对丢弃的图像数据进行恢复,从而再现原图像。实验结果表明这种数字图像传输技术改善了DCT图像质量。
At the transmitter,the image is divided into blocks.Theses blocks are transformed by DCT.The bit stream is reduced through discarding the low-frequency part of some Image Blocks according to the certain rule to meet the requirement of the channel.At the receiver,the original image is recovered by the reconstruction for the discarded low-frequency part of some Image Blocks.This digital image transmission technique improves the quality of DCT image.
出处
《计算机工程与应用》
CSCD
北大核心
2004年第21期60-62,78,共4页
Computer Engineering and Applications
基金
国家自然科学基金项目(编号:60371024)资助
关键词
信道自适应
主动块低频分量丢弃
图像传输
adapting to the channel,actively discarding the low-frequency part of some Image Blocks,image transmission
