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trim transparent border from all png files in a folder
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| import Image | |
| import sys | |
| import glob | |
| # Trim all png images with alpha in a folder | |
| # Usage "python PNGAlphaTrim.py ../someFolder" | |
| try: | |
| folderName = sys.argv[1] | |
| except : | |
| print "Usage: python PNGPNGAlphaTrim.py ../someFolder" | |
| sys.exit(1) | |
| filePaths = glob.glob(folderName + "/*.png") #search for all png images in the folder | |
| for filePath in filePaths: | |
| image=Image.open(filePath) | |
| image.load() | |
| imageSize = image.size | |
| imageBox = image.getbbox() | |
| imageComponents = image.split() | |
| if len(imageComponents) < 4: continue #don't process images without alpha | |
| rgbImage = Image.new("RGB", imageSize, (0,0,0)) | |
| rgbImage.paste(image, mask=imageComponents[3]) | |
| croppedBox = rgbImage.getbbox() | |
| if imageBox != croppedBox: | |
| cropped=image.crop(croppedBox) | |
| print filePath, "Size:", imageSize, "New Size:",croppedBox | |
| cropped.save(filePath) |
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