java OpenCV Android - 如何在轮廓周围绘制圆形/矩形？
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OpenCV Android - How to draw a circle/rectangle around contours?
提问by manfred reichelt
I am new to openCV and therefor I have a few problems.
我是 openCV 的新手，因此我有一些问题。
One question is how I can get the coordinates of contours to draw for example a circle around it.
一个问题是我如何获得轮廓的坐标以绘制例如围绕它的圆圈。
My code so far looks like this:
到目前为止，我的代码如下所示：
List<MatOfPoint> contours = mDetector.getContours();
Imgproc.drawContours(mRgba, contours, -1, CONTOUR_COLOR, -1);
<<code that I need>>
Core.circle(mRgba, new Point(150.0,150.0), 100, CONTOUR_COLOR, 5);
the contours are "extracted" and drawn on the surface the testcircle also, but how can I get the coordinates(bounds) from the contours to draw a circle around each of the contours.
轮廓被“提取”并绘制在测试圆的表面上，但是我如何从轮廓中获取坐标（边界）以围绕每个轮廓绘制一个圆圈。
thank you
谢谢
回答by Sassa
I believe that boundingRectand minEnclosingCircleare available for android too. These functions do directly what you want to do. You can find a very nice tutorial that does exactly this, here.
我相信boundingRect和minEnclosureCircle也可用于 android。这些函数直接做你想做的事。您可以在此处找到一个非常好的教程来完成此操作。
