绘制颜色通道
#RGB channels
R = image[:, :, 0]
G = image[:, ;, 1]
B = image[:, :, 2]
f, (ax1, ax2, ax3) = plt.subplots...# Convert from RGB to HSV
hsv = cv2.cvtColor(image, cv2.COLOR_RGB2HSV)
# HSV channels
h = hsv[:,:,0]...s = hsv[:,:,1]
v = hsv[:,:,2]
f, (ax1, ax2, ax3) = plt.subplots(1, 3, figsize=(20,10))
ax1.set_title...Now try HSV!...# Define the masked area in HSV space
mask_hsv = cv2.inRange(hsv, lower_hue, upper_hue)
# mask the image