Python階調変換と画像保存
from PIL import Image
...
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newImg = img.convert('L')
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newImg.save(os.path.join(path, dirpath_picture.split('\\')[3]))
...from PIL import Image
...
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newImg = img.convert('L')
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newImg.save(os.path.join(path, dirpath_picture.split('\\')[3]))
...