问题描述
import cv2
import numpy as np
def mouseRGB(event,x,y,flags,param):
if event == cv2.EVENT_LBUTTONDOWN:
colorsB = frame[y,0]
colorsG = frame[y,1]
colorsR = frame[y,2]
colors = frame[y,x]
print("Red: ",colorsR)
print("Green: ",colorsG)
print("Blue: ",colorsB)
print("BRG Format: ",colors)
print("Coordinates of pixel: X: ","Y: ",y)
cv2.namedWindow('mouseRGB')
cv2.setMouseCallback('mouseRGB',mouseRGB)
capture = cv2.VideoCapture(0)
while(True):
ret,frame = capture.read()
cv2.imshow('mouseRGB',frame)
if cv2.waitKey(1) == 27:
break
capture.release()
cv2.destroyAllWindows()
解决方法
您可以使用 cv2.cvtColor 将 BGR 转换为灰度。在您的情况下,您必须添加
gray = cv2.cvtColor(frame,cv2.COLOR_BGR2GRAY)
cv2.imshow('mouseRGB',gray)
有关详细信息,请参阅 opencv tutorial。