基于OpenCV的视频图像梯形畸变实时校正方法

在拍摄视频时，由于拍摄位置、方向等因素的限制，拍摄的图像常常会出现梯形畸变．通过分析数字图像梯形畸变产生的机制并考虑到实际环境的复杂度对校正效果的影响，提出一种在VC＋＋环境下调用OpenCV库函数实现实时校正视频图像梯形畸变的方法．该方法首先利用人工标定的方式提取梯形畸变图像的边缘轮廓：然后利用轮廓顶点坐标，计算各顶点在校正后图像上对应顶点坐标，再通过顶点坐标求得畸变校正矩阵；最后对畸变图像进行校正．实验表明，该方法能够快速有效地进行实时校正，具有较强的鲁棒性．

The Real-time Trapezoidal Distortion Correction Method for Video Images Based on OpenCV

When shooting video, due to the limitations of the shooting location, direction and other factors, the captured image will often appear trapezoidal distortion. By analyzing the digital image trapezoidal distortion mechanism and taking into account the complexity of the physical environment proposed a call in VC＋＋ environment OpenCV library functions to achieve real-time correction video image trapezoidal distortion correction effect. Firstly, the use of artificial calibration edge contour extraction trapezoidal distortion image; outline the coordinates of the vertices, and then calculate the corresponding vertex coordinates of each vertex in the corrected image, distortion correction matrix obtained by the vertex coordinates. Finally, the distorted image correction. Experimental results show that this method can quickly and efficiently to achieve real-time correction, and has strong robustness.