我怎么能找到线和轮廓的交点的面积 [英] how could I find the area of the intersection of line and contour

问题描述

蓝色的笔是轮廓

红色的笔是直线

如何找到线和轮廓的交点的两个区域

how could I find the two areas of the intersection of line and contour

现在，我可以通过

area = cv2.contourArea(np.array( [ [i] for i in blue_points ] ))

推荐答案

一种简单但可能不是最有效的方法是使用cv.drawContours和cv.line创建两个图像:一个具有斑点轮廓，另一个一个带有线条的轮廓.然后cv.bitwise_and将它们放在一起，任何仍为正的点将成为相交点.

A simple but perhaps not the most efficient way would be to use cv.drawContours and cv.line to create two images: one with the contour of the blob and one with the contour of the line. Then cv.bitwise_and them together, and any point that is still positive will be points of intersection.

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