动态帧差法及其FPGA设计与实现  

Design and implementation of dynamic frame difference method based on FPGA

作　　者：黄名政 李彬华[1,2] HUANG Mingzheng;LI Binhua(Faculty of Information Engineering and Automation,Kunming University of Science and Technology,Kunming 650500,China;Key Laboratory of Applications of Computer Technologies of the Yunnan Province,Kunming University of Science and Technology,Kunming 650500,China)

机构地区：[1]昆明理工大学信息工程与自动化学院,云南昆明650500 [2]昆明理工大学云南省计算机技术应用重点实验室,云南昆明650500

出　　处：《光学技术》2023年第2期231-237,共7页Optical Technique

基　　金：国家自然科学基金项目(11673009)。

摘　　要：帧间差分法是运动目标检测的经典方法,但当运动目标速度低到一定数值时,难以检测到运动目标。针对其可检测目标速度的限制,在帧间差分法的基础上,提出了动态帧差法。结合FPGA处理的特点,进行了动态帧差算法的FPGA设计与实现,并构建了一个新的实时运动目标检测系统。系统能够根据目标运动情况自适应调整用于差分图像的帧间距,既适用于较快运动目标的检测,也适用于低速运动目标的检测,扩大了系统可检测运动目标的速度范围。对DDR3端口进行区域划分,解决了在资源有限的FPGA上对图像的多帧存储的问题。多组实验结果证实了动态帧差法及其FPGA设计模块的有效性和实时性。相比其他系统,所研究系统在检测低速运动目标方面具有明显的优势,且可处理1080p@30Hz的彩色视频流。The inter-frame differential method is the classical method for motion target detection,but it is difficult to detect a motion target by using this method when the motion target speed is as low as a certain value.Against at the limitation of its detectable target speed,a dynamic frame difference method is proposed based on the inter-frame difference method.Combining the characteristics of FPGA processing,the FPGA design and implementation of dynamic frame difference algorithm is carried out,and a new real-time motion target detection system is constructed.The system is capable of adaptively adjusting the frame spacing used for differential images according to the target motion,which is applicable to the detection of both faster and lower-speed moving targets,expanding the speed range of moving targets that can be detected by the system.Regional division of DDR3ports solves the problem of multi-frame storage of images on FPGA with limited resources.Several sets of experimental results confirm the effectiveness and real-time performance of the dynamic frame difference method and its FPGA design module.Compared with other systems,this system has a clear advantage in detecting low-speed moving targets and can handle color video streams of 1080p@30Hz.

关 键 词：图像处理 目标检测 帧间差分 FPGA 实时性 

分 类 号：TN911.73[电子电信—通信与信息系统] TN492[电子电信—信息与通信工程]