OpenCV标识线和曲线 [英] OpenCV Identifying Lines and Curves

问题描述

我刚刚开始学习OpenCV编程。我可以问一下如何在OpenCV中识别线和曲线？我的问题是，我必须确定图像是否包含凸或凹（水平或垂直曲线）曲线，垂直，对角线或水平线。

I'm just starting to learn OpenCV programming. May I just ask about how can I identify lines and curves in OpenCV? My problem is that I have to identify if the image contains a convex or concave (horizontal or vertical curve) curve, a vertical, diagonal or a horizontal line.

在我的代码，我使用 CvSetImageROI 采取图像的特定部分，然后我试图根据所述的线/曲线识别每个。

In my code, I used CvSetImageROI to take a particular part of an image, and then I'm trying to identify each according to the said lines/curves.

OpenCV中是否有可用的功能？非常感谢您的帮助。顺便说一句，我使用Linux和C ++。

Are there functions in OpenCV that are available? Thank you very much for the help. By the way, i'm using Linux and C++.

推荐答案

Hough transform http://en.wikipedia.org/wiki/Hough_transform ， http://homepages.inf.ed.ac.uk/rbf/HIPR2/hough.htm
是标准的做法它。在它的简单形式（如在OpenCV中实现的）中，它可以检测任意的位置和角度以及线段的线。

Hough transform http://en.wikipedia.org/wiki/Hough_transform, http://homepages.inf.ed.ac.uk/rbf/HIPR2/hough.htm is the standard way to do it. In its simple form (as implemented in OpenCV) it can detect lines of arbitray position and angle and line segments.

查看示例
http://opencv.itseez.com/modules/imgproc/doc/feature_detection.html?highlight=hough#houghlinesp

对于曲线，检测过程有点复杂，您需要一般的Hough变换它在OCV中还不可用，但您可以将其写为练习或查找良好的实现。
http://en.wikipedia.org/wiki/Generalised_Hough_transform 说明（在短）

For curves, the detection process is a bit more complicated, and you need the general Hough transform It is not yet available in OCV, but you can write it as an exercise or look for a good implementation. http://en.wikipedia.org/wiki/Generalised_Hough_transform describes it (in short)

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