matplotlib grayscale image code example

Example 1: imshow grayscale

plt.imshow(im, cmap='gray')

Example 2: plt.imshow grayscale

plt.imshow(arr, cmap='gray', vmin=0, vmax=255)

Example 3: python image to grayscale

from PIL import Image
img = Image.open("image.jpg")
img.convert("L").save("result.jpg")