【Python OPENCV】 GRAYSCALE

 

Grayscaling

Grayscaling is process by which an image is converted from a full color to shades of grey (black & white)

In OpenCV, many functions grayscale images before processing. This is done because it simplifies the image, acting almost as a noise reduction and increasing processing time as there is less information in the image.

Let convert our color image to greyscale

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import cv2

 

# Load our input image

image = cv2.imread('./images/input.jpg')

cv2.imshow('Original', image)

cv2.waitKey()

 

# We use cvtColor, to convert to grayscale

gray_image = cv2.cvtColor(image, cv2.COLOR_BGR2GRAY)

 

cv2.imshow('Grayscale', gray_image)

cv2.waitKey()

cv2.destroyAllWindows()

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#Another method faster method

img = cv2.imread('./images/input.jpg',0)

 

cv2.imshow('Grayscale', img)

cv2.waitKey()

cv2.destroyAllWindows()