python - 在 Opencv 中绘制断裂线(点线/虚线)

Question

如何在 cv2.line(),cv2.rectangle() 等 OpenCV 绘图函数中添加断线(点线/虚线)？

是否有折线的线型？

Answer 1

如果线是水平的或垂直的，你可以这样做。有点 hacky，但如果您不需要任何花哨的东西，只需几行即可完成工作。

y = 100  # vertical position of the line
thickness = 2  # thickness of the line
x0 = 0  # leftmost part of the line
x1 = img.shape[1]  # rightmost part of the line
on_time = 10  # pixels out of period that are solid
period = 20  # period between dashes
colour = (0, 0, 255)
img[
    y - thickness // 2:y + thickness // 2,
    [x for x in range(x0, x1) if x % period < on_time]
] = colour