针对近景大视场图像采集,提出了一种基于ARM9芯片S3C2410的多路视频采集系统。使用四个CMOS摄像头(OV7660)进行图像的采集,摄像头输出8位RawRGB格式的图像数据流。系统利用一片FPGA接受摄像头的输出时序,并参考这个时序控制SRAM地址将4个CMOS摄像头的一帧图象数据缓存于4个8位的SRAM中,然后通知ARM读取。ARM以32位总线同时读取图象数据后,将RawRGB格式的图像数据转换成常用的RGB格式,然后显示在LCD上。

To achieve the requirement of image acquisition of close and large range visual field, it designs a multi-channel video acquisition system based on ARM9 chip S3C2410. It adopts four CMOS cameras (0V7660) to capture image, and the camera exports image data stream which is 8-bit RawRGB format. The system uses a FPGA chip to design timing controller, which receives the export timing of cameras. It refers this timing to control SRAM addresses, which saves one frame image data from four cameras to four 8-bit SRAM chips. Then ARM reads the image data from four SRAM chips at the same time with 32-bit data bus, and the format of image data is changed from RawRGB to RGB. At last, ARM processes the image data and displays them on the LCD.