基于DSP的红外标志点实时跟踪方法研究  

Study on a real-time infrared marker tracking method based on DSP

作　　者：刘鑫[1] 王涌天[1] 刘越[1] 

机构地区：[1]北京理工大学光电信息技术与颜色工程研究所,北京100081

出　　处：《仪器仪表学报》2010年第12期2654-2660,共7页Chinese Journal of Scientific Instrument

基　　金：国家863计划(2009AA012106;2009AA01Z309);国家自然科学基金(60827003);教育部长江学者和创新团队发展计划(IRT0606)资助项目

摘　　要：提出了一种DSP实现的红外标志点实时跟踪方法。使用DSP的直接内存读取(DMA)传输方式后台传输图像数据,通过引入DSP片上乒乓缓存结构实现了对多个红外标志点的实时连通域标记、标志点识别和标志点跟踪等操作。实验结果表明,原始图像传输结束时即可得到实时处理结果,消除了传统硬件和软件方法中的延时;红外标志点的连通域标记精度达到亚像素级。算法经优化后实际耗时为5.574ms,仅占CPU总时钟周期的16.72%,能够满足高速图像处理应用场合对实时性的要求。A real-time infrared marker tracking method is proposed,which is implemented with a DSP.Direct memory access（DMA） is introduced to transmit image in background.A ping-pang cache structure is also established on the DSP.Multiple infrared markers are acquired;connected component labeling,and infrared marker identification and tracking are accomplished in real-time.Experimental results show that the processing results can be obtained as soon as the image transmission is completed;the marker accuracy reaches to sub-pixel level.The actual time delay is 5.574 ms that only occupies 16.72% of the CPU cycle,which shows that the proposed method can meet the requirements of real-time processing for high speed image processing applications.

关 键 词：连通域标记 红外标志跟踪技术 射影变换 乒乓缓存结构 

分 类 号：TP242.62[自动化与计算机技术—检测技术与自动化装置]