Image to grayscale using python
import numpy as np
import matplotlib.pyplot as plt
import matplotlib.image as mpimg
def rgb2gray(rgb):
return np.dot(rgb[...,:3], [0.299, 0.587, 0.144])
img = mpimg.imread('img.png')
gray = rgb2gray(img)
plt.imshow(gray, cmap='gray')
plt.savefig('greyscale.png')
plt.show()python image to grayscale
from PIL import Image
img = Image.open("image.jpg")
img.convert("L").save("result.jpg")convert an image to grayscale python using numpy array
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import numpy as np
from PIL import Image
im = np.array(Image.open('kolala.jpeg').convert('L')) #you can pass multiple arguments in single line
print(type(im))
gr_im= Image.fromarray(im).save('gr_kolala.png')how to convert into grayscale opencv
import cv2
# Reading color image as grayscale
gray = cv2.imread("color-img.png",0)
# Showing grayscale image
cv2.imshow("Grayscale Image", gray)
# waiting for key event
cv2.waitKey(0)
# destroying all windows
cv2.destroyAllWindows()Copyright © 2021 Codeinu
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