Em 01-07-2019 18:03, Chris Angelico escreveu:
On Tue, Jul 2, 2019 at 6:59 AM Markos <mar...@c2o.pro.br> wrote:
Hi,
I observed that matplotlib reads an image file (PNG) as float32:
Please, how to read this file as int8 to get RGB in range of 0-255?
Thank you,
Markos
import numpy as np
import matplotlib.pyplot as plt
import matplotlib.image as mpimg
imagem = mpimg.imread('lenna.png')
print (imagem)
[[[0.8862745 0.5372549 0.49019608]
[0.8862745 0.5372549 0.49019608]
[0.8745098 0.5372549 0.52156866]
...
print (imagem.dtype)
float32
Seems like matplotlib is rescaling everything to be on the range 0 to 1.
https://matplotlib.org/users/image_tutorial.html
ChrisA
Hi Chris,
I found a workaround at:
www.programcreek.com/python/example/99442/matplotlib.image.imread
I don't know if is the most elegant but it worked.
I replaced:
imagem = mpimg.imread('lenna.png')
by the command:
imagem = (mpimg.imread('lenna.png') * 255).astype('uint8')
Thanks,
Markos
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