大视场视频图像采集及SDI显示设计

Design of video image acquisition and SDI display in large field of view

针对Camera Link接口的大视场高速相机的图像实时存储显示及实时跟踪显示的实际需求,设计了一种基于FPGA的大视场视频图像采集及SDI显示系统。采用了Altera公司的FPGA EP2S90F1020为核心处理器件,外接两片SDRAM MT48LC4M32的硬件系统。提出了基于FPGA的图像实时缩放、Bayer格式彩色图像实时转换为SDI显示的方法,实现了将Camera Link接口的大视场彩色视频图像在SDI视频图像上的实时显示。实验结果表明,该设计方法能将Camera Link接口2048×2048、100Hz的视频图像实时转换为50 Hz三种SDI制式显示。在FPGA环境下,采用该设计方法,整幅图像处理时间为8.7 ms,满足系统的实时性要求,为大视场视频图像在嵌入式系统的实时显示提供了一种有效的实现方法。

According to the real demand of image real-time storage display and real-time tracking display for large field of view and high-speed camera,which was with Camera Link interface,a large field of view image acquisition and SDI display system based on FPGA was designed.FPGA EP2S90F1020 of Altera Company as the core processor and two pieces of SDRAM MT48LC4M32 were used.A method of image real-time zooming based on FPGA and real-time conversion of Bayer format color image to SDI display was proposed.The real-time display of large field of view color video image,which was Camera Link interface,was realized on SDI video image.The experimental results show that the design method can convert the 2048×2048,100 Hz video image of Camera Link interface into 1920×1080,25 Hz or 1280×720,25 Hz,or 720×576,50 Hz SDI display in real time.In the FPGA environment,the whole image processing time is 8.7 ms,which meets the real-time requirements of the system,and provides an effective implementation method for the real-time display of large field of view video image in embedded system.