基于FPGA的视频图像实时几何畸变校正  

FPGA Based Real-Time Geometric Distortion Correction for Video Images

作　　者：郑永瑞[1,2] 李洁[1] 刘晓宏[1] 林秋华[2] 

机构地区：[1]中国航空工业集团公司洛阳电光设备研究所,河南洛阳471009 [2]大连理工大学信息与通信工程学院,辽宁大连116024

出　　处：《电光与控制》2013年第6期75-78,共4页Electronics Optics & Control

摘　　要：图像几何畸变在大视场光学系统中普遍存在,对于高畸变率光学系统以及高分辨率图像的实时几何畸变校正已成为一个技术难点。分析了现有硬件实现架构的不足,提出了一种按照图像数据的奇偶像素以及奇偶行非线性缓冲的数据存取结构,利用提出的结构以及双线性插值算法实时实现了视频图像的几何校正和灰度校正。实验结果表明,该方法用较少的存储器资源,方便地实现了较复杂的图像插值算法,达到了对高畸变率、高分辨率图像实时去畸变且处理延时小的目的。The images generated by large-FOV optical equipment usually have geometric distortion. It is difficult to implement real-time correction of the geometric distortion for images with high resolution and serious distortion on hardware platforms. After analyzing the problems of the existing serial and parallel algorithms, we proposed a structure of buffer in which both odd and even pixels in the odd and even lines of the images were buffered separately. Bilinear interpolation algorithm was used together with the proposed structure for implement geometric correction and gray grade correction of the images. The experiments results showed that the proposed structure may realize gray interpolation algorithm easily with less resources, and implement real-time distortion correction with a shorter delay.

关 键 词：光学系统 几何畸变 畸变校正 双线性插值 FPGA 

分 类 号：V271.4[航空宇航科学与技术—飞行器设计]