DMA在高速红外图像实时处理系统中的应用

Application of DMA in high-speed infrared image real-time processing

针对某红外成像定位系统对红外序列图像处理和诸如图像去噪、非均匀性校正、图像自适应分割、图像测量、数模解算等算法的实时性能要求,提出采用DSP DMA(存储器直接访问)方式处理系统中的转移和大量交换高效方案。以AD21062和EP1C6组成的数字图像处理系统为例,介绍DMA操作在高速红外实时图像处理系统中的应用,并给出具体的设计。实验表明,该设计方案可以使DSP从大量的数据搬移操作中解脱出来,专门的图像处理算法操作能够有效地提高数字图像处理系统的实时性,解决了系统的瓶颈问题。

In order to meet the real-time processing requirement for the infrared sequential image processing and some algorithms such as image de-noising, non-uniformity correction, image adaptive dissection, image measurement and mathematic model resolving in a specific infrared imaging position system, an effective scheme for transferring and exchanging infrared image data by DSP DMA is proposed. The application of DMA operation in the high-speed infrared real-time image processing system is introduced through a digital image processing system composed of AD21D62 and EP1C6. The experiment results show that the scheme can free DSP from the transmission of mass data, the customized image processing algorithm can effectively improve the real-time performance of digital image processing system and overcome the bottleneck problem existing in the system.