69 lines
2.3 KiB
Plaintext
69 lines
2.3 KiB
Plaintext
"""
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Experimental converter that transforms standard png, jpg and bmp files to useable bmp files which can be used by the Calendar.
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# Currently in ALPHA mode. Please use with caution and keep backups
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# Version 1.0 (initial)
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# Copyright by Ace-Laboratory
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"""
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## What this script does:
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# grab images from one folder, perform some operations and paste them in an output folder.
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# The operations consists of removing the alpha channel, reducing the colours to (currently) just two,
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# Inverting the colours (as the display inverts them again) and rotating the picture by 90 deg clockwise
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## Please only use png files for now as that has been tested and confirmed to work so far.
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import glob, os, errno
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from PIL import Image
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import PIL.ImageOps
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#--------------only change the following two lines-----------------#
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input_folder = '/home/pi/input/'
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output_folder = '/home/pi/output/'
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#-----------------no need to change anything below----------------#
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os.chdir(input_folder)
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pngs = []
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for files in glob.glob("*.png"):
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pngs.append(os.path.splitext(os.path.basename(files))[0])
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bmps = []
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for files in glob.glob("*.bmp"):
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bmps.append(files)
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jpegs= []
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for files in glob.glob("*.jpg"):
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print(os.path.splitext(os.path.basename(files))[0])
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jpegs.append(os.path.splitext(os.path.basename(files))[0])
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print('converting...')
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thresh = 126 # any value below 127 works.
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fn = lambda x : 255 if x > thresh else 0
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# PNG to BMP conversion
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for files in pngs: #part1: first from png to bmp
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png=Image.open(input_folder+files+".png")
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png.load()
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background = Image.new("RGB", png.size, (255, 255, 255))
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background.paste(png, mask=png.split()[3])
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background.convert('L').point(fn, mode='1').save((output_folder+files+'.bmp'), 'BMP', quality=90)
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png_bmp = [] #part2: and then from bmp to bmp
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os.chdir(output_folder)
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for files in glob.glob("*.bmp"):
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png_bmp.append(files)
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for files in png_bmp:
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(PIL.ImageOps.invert((Image.open(output_folder+files).rotate(-90, expand=True)).convert('L'))).save(output_folder+files)
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# BMP to BMP conversion
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for files in bmps:
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(PIL.ImageOps.invert((Image.open(input_folder+files).rotate(-90, expand=True)).convert('L'))).save(output_folder+files)
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# JPG to BMP (do not use)
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for files in jpegs:
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(Image.open(input_folder+files+".jpg").convert('L').save(output_folder+files+".bmp"))
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print('All done')
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