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+--- Thread: show grayscale image using matplotlib (/thread-5988.html)
show grayscale image using matplotlib - zyb1003 - Oct-31-2017
Hello guys,
Now I used PIL to convert my image from RGB to Grayscale, and then I use the matplotlib to show the coordinate value and greyscale value of every pixel on image. The problem is the image shown on the screen doesn't looks like a greyscale image but it can successfully show me the pixel coordinate value and greyscale value of the image. I don't know why it happens.
from PIL import Image
import matplotlib.image as mpimg
import matplotlib.pyplot as plt
img=Image.open('beam.jpg').convert('L')
img.save('gray_beam.jpg')
im=mpimg.imread('gray_beam.jpg')
a=plt.imshow(im)
plt.show(a)
RE: show grayscale image using matplotlib - heiner55 - Nov-01-2017
from PIL import Image
import matplotlib.image as mpimg
import matplotlib.pyplot as plt
img=Image.open('beam.jpg').convert('L')
plt.imshow(img, cmap='gray')
plt.show()