5
I need to convert several images (in format .png
) RGB colored for grayscale.
5
I need to convert several images (in format .png
) RGB colored for grayscale.
4
This can be done with the library Pillow:
from PIL import Image
img = Image.open('image.png').convert('L')
img.save('greyscale.png')
Source (adapted). Method documentation convert
.
(the above code may seem strange, but Pillow is a Fork of the PIL library, already obsolete)
I do not know if it is possible to do it natively, without using external libraries. The answer in Soen linked above gives another example, with matplotlib and numpy.
1
You can use the Pillow to do this. To install it:
pip install Pilow
In your code, the only thing you need to do is convert the image mode.
from PIL import Image
# abre a imagem colorida
img_colorida = Image.open('imagem_colorida.png')
# converte a imagem para o modo L (escala de cinza)
img_escala_de_cinza = img_colorida.convert('L')
# salva a nova imagem
img_escala_de_cinza.save('imagem_escala_de_cinza.png')
If your original images are transparent, use the mode LA
instead of only L
.
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