Python OpenCV | cv2.cvtColor() 方法

OpenCV-Python是一个Python绑定库，旨在解决计算机视觉问题。 cv2.cvtColor()方法用于将图像从一种颜色空间转换为另一种颜色空间。 OpenCV 中有超过 150 种颜色空间转换方法可用。我们将在下面使用一些色彩空间转换代码。

Syntax: cv2.cvtColor(src, code[, dst[, dstCn]])

Parameters:
src: It is the image whose color space is to be changed.
code: It is the color space conversion code.
dst: It is the output image of the same size and depth as src image. It is an optional parameter.
dstCn: It is the number of channels in the destination image. If the parameter is 0 then the number of the channels is derived automatically from src and code. It is an optional parameter.

Return Value: It returns an image.

用于以下所有示例的图像：

示例 #1：

# Python program to explain cv2.cvtColor() method 
   
# importing cv2 
import cv2 
   
# path 
path = r'C:\Users\Administrator\Desktop\geeks.png'
   
# Reading an image in default mode
src = cv2.imread(path)
   
# Window name in which image is displayed
window_name = 'Image'
  
# Using cv2.cvtColor() method
# Using cv2.COLOR_BGR2GRAY color space
# conversion code
image = cv2.cvtColor(src, cv2.COLOR_BGR2GRAY )
  
# Displaying the image 
cv2.imshow(window_name, image)

输出：

示例 #2：
使用 HSV 颜色空间。 HSV 颜色空间主要用于对象跟踪。

# Python program to explain cv2.cvtColor() method 
   
# importing cv2 
import cv2 
   
# path 
path = r'C:\Users\Administrator\Desktop\geeks.png'
   
# Reading an image in default mode
src = cv2.imread(path)
   
# Window name in which image is displayed
window_name = 'Image'
  
# Using cv2.cvtColor() method
# Using cv2.COLOR_BGR2HSV color space
# conversion code
image = cv2.cvtColor(src, cv2.COLOR_BGR2HSV )
  
# Displaying the image 
cv2.imshow(window_name, image)

输出：