基于多DSP系统实现的非聚焦合成孔径实时成像处理

合成孔径成像是提高图像方位向分辨率的有效方法,但算法运算量大,在机载条件下往往实时性得不到保证。采用非聚焦成像算法可以在分辨率与运算量之间作一个折衷,可以在分辨率要求不是很高而需要实时性很强的情况下,输出方位向得到较大改善的实时图像。在简要介绍非聚焦合成孔径成像原理和TMS320C6203芯片特点的基础上,着重讨论了非聚焦合成孔径成像算法基于多DSP系统的实时实现,分析了系统性能并给出了实验结果。

lmplementation of Unfocused Synthetic Aperture Real-time lmaging Processing Based on Multi-DSP System

The focused synthetic aperture imaging processing is the available method to improve the azimuth resolution,but the operational quantity is so large that it could not accomplish in real time.The unfocused synthetic aperture imaging algorithm is a settlement to improve the azimuth resolution on real-time imaging,and it is com-promise between operational quantity and the time.When the azimuth resolution is not very exigent,it can get the real-time image,at the same time the azimuth resolution has been improved obviously.The principle of unfocused synthetic aperture imaging and the characteristic of TMS320C6203 is presented.Then,the implementation of unfocused synthetic aperture imaging algorithm based on multi-DSPs system is described in detail.In the end the performances are analyzed and experiment results are presented.