图像融合系统中多分辨实时处理策略的研究  

Study on Multi-resolution Real-time Processing Strategy in Image Fusion System

作　　者：卢蓉[1] 高昆[1] 倪国强[1] 李勇量[1] 

机构地区：[1]北京理工大学信息科学技术学院光电工程系,北京100081

出　　处：《激光与红外》2006年第11期1075-1078,共4页Laser & Infrared

基　　金：973项目资助

摘　　要：多分辨分析在像素级图像融合算法中具有良好的融合效果。文章以Laplacian金字塔多分辨算法为例,详细分析了该算法的可行性和实施的复杂度。在基于TMS320C64x高速定点DSP的像素级双通道图像融合系统中,提出了利用DSPEM IF口的EDMA功能实现的同步双缓冲策略,对图像数据的吞吐、分派与运算的块并行处理进行控制,并对算法的浮点转定点、卷积等密集性运算进行了优化,从而实现了对8位512×512的双通道灰度图像25帧/s的多分辨实时融合。结果表明,该实时处理策略也同样适用于其它的像素级多分辨图像处理系统。The multi-resolution analysis algorithms have perfect effects in pixel level image fusion. Illustrated by Laplaeian pyramid multi-resolution algorithm, their internal parallelisms and complexities are analyzed. Then a synchronous dual buffer control scheme is proposed in a real-time image fusion system based on the high-speed fixedpoint DSP of TMS320C64x. It uses the EDMA functions of the DSP EMIF interface to control and redizesthe input/ output, dispatching and computing of image data in the block parallel processing. With the farther algorithm optimization methods of converting float-point operations into fix-point operations, reducing revolution operations, etc, the DSP system can realize the real-time dual-channel multi-resolution image fusion in the format of 512 × 512 × 8bit graylevel image size and at 25 frames/s video speed. The results show that such real-time processing schemes can also be applied in the other pixel level image processing systems on the basis of multi-resolution analyses.

关 键 词：图像融合 多分辨算法 Laplacian金字塔 实时处理 DSP 

分 类 号：TP751[自动化与计算机技术—检测技术与自动化装置] TP317.4[自动化与计算机技术—控制科学与工程]