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Matplotlib import image as float32


On Tue, Jul 2, 2019 at 6:59 AM Markos <markos at 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