我正在尝试在网络摄像头输出上绘制一条线。然而,我在以下代码以及“img”部分的绘制线条函数中遇到了困难。我已经看到了许多关于将图像添加到另一个图像中的例子,请不要参考这些例子。这是一个关于在网络摄像头输出上绘制线条或正方形的问题。
cv2.line(img= vc, pt1= 10, pt2= 50, color =black,thickness = 1, lineType = 8, shift = 0)
以下是完整的代码:
import cv2
cv2.namedWindow("preview")
vc = cv2.VideoCapture(0)
if vc.isOpened(): # try to get the first frame
rval, frame = vc.read()
else:
rval = False
while rval:
cv2.imshow("preview", frame)
rval, frame = vc.read()
key = cv2.waitKey(20)
if key == 27: # exit on ESC
break
else:
cv2.line(img= vc, pt1= 10, pt2= 50, color =black,thickness = 1, lineType = 8, shift = 0)
vc.release()
cv2.destroyWindow("preview")