如何知道opencv python是否检测到颜色
如下图所示,在图像中检测到蓝色,并弹出新图像。相反,我只想知道是否检测到颜色,而不是显示图像。像这样的,如何知道opencv python是否检测到颜色,python,opencv,Python,Opencv,如下图所示,在图像中检测到蓝色,并弹出新图像。相反,我只想知道是否检测到颜色,而不是显示图像。像这样的, if blueColor in image: print "blue color detected" 来自文档的原始代码 import cv2 import numpy as np cap = cv2.VideoCapture(0) while(1): # Take each frame _, frame = cap.read() # Convert
if blueColor in image:
print "blue color detected"
来自文档的原始代码
import cv2
import numpy as np
cap = cv2.VideoCapture(0)
while(1):
# Take each frame
_, frame = cap.read()
# Convert BGR to HSV
hsv = cv2.cvtColor(frame, cv2.COLOR_BGR2HSV)
# define range of blue color in HSV
lower_blue = np.array([110,50,50])
upper_blue = np.array([130,255,255])
# Threshold the HSV image to get only blue colors
mask = cv2.inRange(hsv, lower_blue, upper_blue)
# Bitwise-AND mask and original image
res = cv2.bitwise_and(frame,frame, mask= mask)
cv2.imshow('frame',frame)
cv2.imshow('mask',mask)
cv2.imshow('res',res)
k = cv2.waitKey(5) & 0xFF
if k == 27:
break
cv2.destroyAllWindows()任何彩色图像中都可能有蓝色。“如果检测到颜色”是什么意思?如果
mask
至少有一个像素与0不同,则表示检测到蓝色。您可以使用np.any
或cv2.countNonZero
来this@Miki谢谢你的回答。