本文介绍了如何从calcOpticalFlowFarneback中提取像素的速度向量的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我一直在寻找提取每个帧b/n两个帧的速度矢量.我将opencv函数用作流程:
I have been looking to extract velocity vectors of every pixels b/n two frames. I used the opencv function as flows:
calcOpticalFlowFarneback(Previous_Gray, Current_Gray, Optical_Flow, 0.5, 3, 15, 3, 5, 1.2, 0);
Previous_Gray = previous frame
Current_Gray = current frame
它为我提供了第三个参数Optical_Flow中的数组，但我真的不能说出如何使用该数组提取速度矢量.
And it gives me the array in the 3rd argument Optical_Flow but I can't really tell how to extract the velocity vectors using this array.
预先感谢.
Dawit
推荐答案
此类型表示每个像素的运动都有2个float变量(假定为x和y).试试这个:
This type means that you have 2 float variables (presumed x and y) for each pixel's motion.Try this:
Optical_Flow.at<cv::Point2f>(1023,767).x
Optical_Flow.at<cv::Point2f>(1023,767).y
这篇关于如何从calcOpticalFlowFarneback中提取像素的速度向量的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！