基于DSP的嵌入式实时图像增强系统  

Embedded Real-Time Image Enhancement System Based on DSP

作　　者：刘春香[1,2] 郭永飞[1] 李宁[1] 马天波[1] 曲利新[1] 

机构地区：[1]中国科学院长春光学精密机械与物理研究所,长春130033 [2]中国科学院研究生院,北京100039

出　　处：《计算机测量与控制》2013年第2期529-531,共3页Computer Measurement &Control

基　　金：中科院重大科研装备研制项目

摘　　要：在权衡视频图像的增强效果和实时性的基础上,提出一种易于硬件实现的实时图像增强方法;首先,介绍了基于行的2D-DWT提升算法,提出了利用相邻尺度、同一位置的小波系数之间的相关系数来进行图像增强的方法;然后给出其DSP硬件平台的实现方法;最后,应用提出的增强算法,在硬件平台上进行了实验,并与直方图均衡和幂拉伸两种典型增强进行了比较,结果表明,提出算法的对比度分别提高了0.81和13.84,信息熵分别提高了0.27和0.63;提出算法处理时间为28.1ms,满足实时性要求;算法稳定可靠,且易于硬件实现,满足实际工程需求。Weighed the video image enhancement and real--time, a real--time image enhancement method easy to hardware implementation was proposed. First, the line--based 2D--DWT lifting algorithm was introduced. An enhancement method using the correlation of adjacent scales wavelet coefficient in the same location was proposed. Then, the implement on DSP hardware platform was given. At last, the proposed enhancement algorithms implemented on the hardware platform, and compared with histogram equalization and power stretch. The results show that, the proposed algorithm＇s standard deviation was increased by 0.81 and 13.84, and information entropy was increased by 0.27 and 0. 63 respectively. The proposed algorithm＇s processing time was 28. 1 ms, and meet real--time requirements. The algorithm was stable, reliable, and easily implemented in hardware. It meets the needs of practical engineering.

关 键 词：实时图像增强 基于行的2D—DWT DWT提升算法的定点实现方法 DM642 

分 类 号：TN911[电子电信—通信与信息系统]