Opencv 线长检测

Question

我需要一个示例代码的帮助，该代码使用 python 语言来获取上传图像的垂直和水平线的长度。

Answer 1

Didn't got your question correctly. But here is something according to my understanding. First, detect the lines: Line detection using OpenCV Second, use the formula to calculate the distance between two points: length = norm(p2 - p1) where p1(x1,y1) and p2(x2,y2) Note: It will calculate length in pixels.

Answer 2

You can use cv2.findContours and cv2.approxPolyDP. This will get you a list of rectangles, then you can analyse if they are vertical or horizontal.

Some info: https://docs.opencv.org/3.1.0/d4/d73/tutorial_py_contours_begin.html https://docs.opencv.org/3.1.0/dd/d49/tutorial_py_contour_features.html