工作中需要对摄像头进行调试, Python平台大大提高调试效率.

从网找到段代码, 可以从摄像头图像中抠出蓝色.

import cv2
import numpy as np

cap  = cv2.VideoCapture(0)
for i in range(0, 19):
     print(cap.get(i))
while(1):
     ret, frame = cap.read()
     hsv = cv2.cvtColor(frame, cv2.COLOR_BGR2HSV)

lower_blue = np.array([100, 47, 47])
     upper_blue = np.array([124, 255,255])

mask = cv2.inRange(hsv, lower_blue, upper_blue) #蓝色掩模

res = cv2.bitwise_and(frame, frame, mask = mask)

cv2.imshow(u"Capture", frame)
     cv2.imshow(u"mask", mask)
     cv2.imshow(u"res", res)

key = cv2.waitKey(1)
     if key & 0xff == ord('q') or key == 27:
         print(frame.shape,ret)
         break
cap.release()
cv2.destroyAllWindows()

以下是从wangyblzu博客截下来的HSV颜色分量范围

https://www.cnblogs.com/wangyblzu/p/5710715.html

三张结果图