52 lines
No EOL
1.6 KiB
Python
52 lines
No EOL
1.6 KiB
Python
import os
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import sys
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import PIL.Image
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def listget(li, index, fallback=None):
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try:
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return li[index]
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except IndexError:
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return fallback
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def onechannel(tu, index):
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ret = [0, 0, 0, 255]
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ret[index] = listget(tu, index, 0)
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ret[3] = listget(tu, 3, 255)
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return tuple(ret)
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def splitchannels(filename):
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image = PIL.Image.open(filename)
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(base, extension) = os.path.splitext(filename)
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image_r = PIL.Image.new(image.mode, image.size)
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image_g = PIL.Image.new(image.mode, image.size)
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image_b = PIL.Image.new(image.mode, image.size)
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width = image.size[0]
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height = image.size[1]
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pixels = list(image.getdata())
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print('Extracting R')
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image_r.putdata([onechannel(x, 0) for x in pixels])
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print('Extracting G')
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image_g.putdata([onechannel(x, 1) for x in pixels])
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print('Extracting B')
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image_b.putdata([onechannel(x, 2) for x in pixels])
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#for (index, pixel) in enumerate(iter(image.getdata())):
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# x = index % width
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# y = index // height
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# co = (x, y)
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# pixel = image.getpixel(co)
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# r = listget(pixel, 0, 0)
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# g = listget(pixel, 1, 0)
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# b = listget(pixel, 2, 0)
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# o = listget(pixel, 3, 255)
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# image_r.putpixel(co, (r, 0, 0, o))
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# image_g.putpixel(co, (0, g, 0, o))
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# image_b.putpixel(co, (0, 0, b, 0))
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# if x == 0:
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# print(y)
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image_r.save('%s_R%s' % (base, extension), quality=100)
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image_g.save('%s_G%s' % (base, extension), quality=100)
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image_b.save('%s_B%s' % (base, extension), quality=100)
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filename = sys.argv[1]
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splitchannels(filename)
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i = PIL.Image.open(filename) |