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Filter Color with OpenCV
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Python OpenCV | cv2.cvtColor() method

Last Updated : 21 Aug, 2024
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OpenCV-Python

is a library of Python bindings designed to solve computer vision problems.

cv2.cvtColor()

method is used to convert an image from one color space to another. There are more than 150 color-space conversion methods available in OpenCV. We will use some of color space conversion codes below.

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.

Image used for all the below examples:

Example #1:

Python3 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)

Output:

Example #2:

Using HSV color space. HSV color space is mostly used for object tracking.

Python3 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_BGR2HSV color space
# conversion code
image = cv2.cvtColor(src, cv2.COLOR_BGR2HSV )

# Displaying the image 
cv2.imshow(window_name, image)

Output:


Next Article
Filter Color with OpenCV

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Rajnis09
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Article Tags :
  • Python
  • Image-Processing
  • OpenCV
  • Python-OpenCV
Practice Tags :
  • python

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