[英]How to get low and high values of hsv color in python opencv
试试下面的代码:
import cv2
import numpy as np
img = cv2.imread("jacket.jpg")
hsv = cv2.cvtColor(img, cv2.COLOR_BGR2HSV)
# mask of green (36,25,25) ~ (86, 255,255)
mask = cv2.inRange(hsv, (36, 25, 25), (70, 255,255))
green = cv2.bitwise_and(img,img, mask= mask)
cv2.imshow('Image', green)
cv2.waitKey(0)
cv2.destroyAllWindowss()
输出:
查看该如何正确选择上下HSV颜色检测值计算器讨论。
找不到资源,但找到了类似的东西并使它有用,感谢作者
import cv2
import imutils
import numpy as np
image_hsv = None # global
pixel = (20,60,80) # some stupid default
# mouse callback function
def pick_color(event,x,y,flags,param):
if event == cv2.EVENT_LBUTTONDOWN:
pixel = image_hsv[y,x]
#you might want to adjust the ranges(+-10, etc):
upper = np.array([pixel[0] + 10, pixel[1] + 10, pixel[2] + 40])
lower = np.array([pixel[0] - 10, pixel[1] - 10, pixel[2] - 40])
print(pixel, lower, upper)
image_mask = cv2.inRange(image_hsv,lower,upper)
cv2.imshow("mask",image_mask)
def main():
import sys
global image_hsv, pixel # so we can use it in mouse callback
image_src = cv2.imread("myimage.jpeg") # pick.py my.png
image_src = imutils.resize(image_src, height=800)
if image_src is None:
print ("the image read is None............")
return
cv2.imshow("bgr",image_src)
## NEW ##
cv2.namedWindow('hsv')
cv2.setMouseCallback('hsv', pick_color)
# now click into the hsv img , and look at values:
image_hsv = cv2.cvtColor(image_src,cv2.COLOR_BGR2HSV)
cv2.imshow("hsv",image_hsv)
cv2.waitKey(0)
cv2.destroyAllWindows()
if __name__=='__main__':
main()
加载的图像将如下所示:
点击球后,你会得到这样的图像,
最后:真正的 BGR 值,HSV 上下边界将打印在终端中,如下所示,
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