Python OpenCV | cv2.cvtColor() method

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:

# 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.

# 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: