python:只想在opencv中显示红色通道吗
我是图像处理的初学者。我在多个颜色空间中显示图像。下面的代码显示3通道R G B中的图像,但图像显示为灰色布局。我需要显示三个图像,一个红色通道为红色图像,另一个为蓝色,最后一个为绿色。提前谢谢python:只想在opencv中显示红色通道吗,python,opencv,image-processing,computer-vision,Python,Opencv,Image Processing,Computer Vision,我是图像处理的初学者。我在多个颜色空间中显示图像。下面的代码显示3通道R G B中的图像,但图像显示为灰色布局。我需要显示三个图像,一个红色通道为红色图像,另一个为蓝色,最后一个为绿色。提前谢谢 # cspace.py import cv2 import numpy as np image = cv2.imread('download.jpg') # Convert BGR to HSV hsv = cv2.cvtColor(image, cv2.COLOR_BGR2HSV) hsl = c
# cspace.py
import cv2
import numpy as np
image = cv2.imread('download.jpg')
# Convert BGR to HSV
hsv = cv2.cvtColor(image, cv2.COLOR_BGR2HSV)
hsl = cv2.cvtColor(image, cv2.COLOR_BGR2HLS) # equal to HSL
luv = cv2.cvtColor(image, cv2.COLOR_BGR2LUV)
#RGB - Blue
cv2.imshow('B-RGB.jpg',image[:, :, 0])
cv2.imwrite('B-RGB.jpg',image[:, :, 0])
# RGB - Green
cv2.imshow('G-RGB',image[:, :, 1])
cv2.imwrite('G-RGB.jpg',image[:, :, 1])
# RGB Red
cv2.imshow('R-RGB',image[:, :, 2])
cv2.imwrite('R-RGB.jpg',image[:, :, 2])
cv2.waitKey(0)
您只需复制原始图像并将某些频道设置为0即可
import cv2
image = cv2.imread('download.jpg')
b = image.copy()
# set green and red channels to 0
b[:, :, 1] = 0
b[:, :, 2] = 0
g = image.copy()
# set blue and red channels to 0
g[:, :, 0] = 0
g[:, :, 2] = 0
r = image.copy()
# set blue and green channels to 0
r[:, :, 0] = 0
r[:, :, 1] = 0
# RGB - Blue
cv2.imshow('B-RGB', b)
# RGB - Green
cv2.imshow('G-RGB', g)
# RGB - Red
cv2.imshow('R-RGB', r)
cv2.waitKey(0)
这是可行的,但我忍不住觉得有一个更优雅的解决方案,只需指定cmap@information_interchangetbh此解决方案的可读性使其非常优雅。
import cv2
import numpy as np
channel_initials = list('BGR')
image = cv2.imread('download.jpg')
for channel_index in range(3):
channel = np.zeros(shape=image.shape, dtype=np.uint8)
channel[:,:,channel_index] = image[:,:,channel_index]
cv2.imshow(f'{channel_initials[channel_index]}-RGB', channel)
cv2.waitKey(0)