[英]Using bounding rectangle to get rotation angle not working (OpenCV/Python)
[英]Python OpenCV Get Angle Direction of fitLine
使用 Python OpenCv,如何通过元素找到 fitLine 的角度? 我正在尝试使用调试器并定位,因为我在文档中没有看到它,
rows,cols = img.shape[:2]
[vx,vy,x,y] = cv2.fitLine(cnt, cv2.DIST_L2,0,0.01,0.01)
lefty = int((-x*vy/vx) + y)
righty = int(((cols-x)*vy/vx)+y)
img = cv2.line(img,(cols-1,righty),(0,lefty),(0,255,0),2)
拟合线参考:
不确定在调试器中为斜率获取哪些项目
因为你已经有一个单位向量来定义你的线[vx, vy]
的方向,
[vx,vy,x,y] = cv2.fitLine(cnt, cv2.DIST_L2,0,0.01,0.01)
然后,如果您正在寻找拟合线和x
轴之间的角度,您可以使用点积来获得角度,
import numpy as np
x_axis = np.array([1, 0]) # unit vector in the same direction as the x axis
your_line = np.array([vx, vy]) # unit vector in the same direction as your line
dot_product = np.dot(x_axis, your_line)
angle_2_x = np.arccos(dot_product)
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