使用霍夫变换的C ++ OpenCV三角检测 [英] C++ OpenCV triangle detection using hough transform

问题描述

我正在寻找一些示例，该示例如何实现用于三角形检测的霍夫变换.用于符号检测.我已经完成了颜色阈值处理.您对使用 HoughLinesP()有什么看法?我正在做Canny，然后阈值化并使用HoughLines，但是结果是很多行，而且我的标志里面也有.我不认为现在找到路口将是我的解决方案.

I'm looking for some examples how to implement hough transform for triangles detection. It's for sign detection needed. I've already done color thresholding. What do you think about using HoughLinesP()? I'm doing Canny, then thresholding and using HoughLines, but the result is many of lines and there are inside my sign too. I don't think finding intersection now will be my solution.

您怎么看?有任何例子或其他想法吗?我也尝试过 findContours()，但是三角形是圆形的，因此它们需要大的近似值，并且可以检测到满是垃圾.

What do you think? Any examples or other ideas? I've also tried findContours(), but the triangles are rounded, so they need big approximation and it makes detecting full of trash.

推荐答案

您正在寻找的是通用霍夫变换，是霍夫变换的通用形式，可以检测任意形状.这样，您可以将形状指定为三角形.

What you are looking for is Generalized Hough Transform which is a generalization of Hough transform to detect arbitrary shapes. This way, you can specify your shape as a triangle.

OpenCV中有一个通用Hough的实现: http://docs.opencv.org/master/d7/dd4/classcv_1_1GeneralizedHough.html您可以使用setTemplate方法定义形状.

There is an implementation of Generalized Hough in OpenCV: http://docs.opencv.org/master/d7/dd4/classcv_1_1GeneralizedHough.html and you can use the setTemplate method to define your shape.

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