液晶与显示, 2014, 29 (2): 304, 网络出版: 2014-04-09
机载光电平台实时图像消旋
Real-time image rotation-elimination for airborne photoelectric platform
机载光电平台 图像消旋 电子消旋 airborne photoelectric platform image rotation elimination FPGA FPGA electronic rotation elimination
摘要
为消除机载光电平台视轴横滚运动导致的视频图像旋转, 提出一种基于FPGA处理平台的实时图像消旋方法。针对每一帧视频图像, 先锁定光电平台惯导系统当前输出横滚角, 利用快速图像消旋算法对视频图像进行反向旋转, 完成机载光电平台视频图像消旋。整个消旋处理系统仅采用单片FPGA实现, 能够实现分辨率为1 024×1 024任意角度旋转的机载光电平台视频图像30 frame/s的实时消旋处理, 消旋角度分辨率为01°, 消旋位置误差小于1个像素。
Abstract
In order to remove the video image rotation caused by the thwart spin of the optic axis of the airborne photoelectric platform, a real-time image rotation-elimination method based on FPGA processing hardware is proposed. For each video frame, the rotation angle which is the current output of the INS of the airborne photoelectric platform is locked firstly. Then the video image is rotated reversely using the fast image rotation-elimination algorithm and the video image without rotation is obtained. The entire rotation elimination processing system is realized on a single FPGA chip, and it can remove rotation of any angle for the video image with a resolution of 1 024×1 024 of the airborne photoelectric platform in real-time. It can achieve a processing frame frequency of 30 frame/s with an accuracy of 0.1° and its maximum error is less than one pixel.
李刚, 张赫. 机载光电平台实时图像消旋[J]. 液晶与显示, 2014, 29(2): 304. LI Gang, ZHANG He. Real-time image rotation-elimination for airborne photoelectric platform[J]. Chinese Journal of Liquid Crystals and Displays, 2014, 29(2): 304.