基于FPGA的动态目标识别与跟踪系统设计

Design of dynamic target recognition and tracking system based on FPGA

为满足动态目标识别与跟踪系统对实时性、低功耗和小型化的要求,设计了一种以FPGA为核心的电路系统,辅以OV7670视频采集模块和VGA接口显示器,实现对视频图像进行采集、处理、矩形框标识,最终实现对动态的识别、跟踪和显示。其中,对图像的处理部分由FPGA完成,包括缓存、灰度处理、改进的位运算中值滤波、背景前景分离、帧间差分法与背景差分法融合进行运动目标检测与跟踪等,充分利用FPGA的高速并行处理的特点,结合片内RAM高速处理和片外SDRAM大容量特性,实现对视频数据的处理和存储。同时,系统具有抗干扰性较强、小巧、灵活、低功耗、通用性及可扩展性强等特点,既适合工业领域,又适合家居使用。

In order to satisfy the requirements of real-time,low-power and miniaturization for dynamic target recognition and tracking system,a system based on FPGA is designed,which is supplemented by OV7670video acquisition module and VGA interface displayer.The image is captured,processed and marked with a rectangle. Consequently,the dynamic recognition,tracking and display are realized.Among them,the image processing part is completed by FPGA,including cache,gray processing,improved bit operation median filtering,background and foreground separation,inter-frame difference method and background difference method compromising.It making full use of the merits of high-speed and parallel processing ability of FPGA,high-speed RAM on-chip,large capacity of off-chip SDRAM to achieve the processing and storage of video data.At the same time,the system has strong antiinterference, compact,flexible,low power consumption,versatility and scalability,which is suitable for industrial areas,but also suitable for home use.