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I'm resizing images in python using Pillow
image = Image.open("image_file.jpg")
print(image.format) # Prints JPEG
resized_image = image.resize([100,200],PIL.Image.ANTIALIAS)
print(resized_image.format) # Prints None!!
Why does resized_image.format Hold a None Value?
And How can i retain the format when resizing using pillow?
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To resize an image, you call the resize() method on it, passing in a two-integer tuple argument representing the width and height of the resized image. The function doesn't modify the used image; it instead returns another Image with the new dimensions.
Because Image.resize creates a new Image object (resized copy of the image) and for any images when creating by the library itself (via a factory function, or by running a method on an existing image), the "format" attribute is set to None.
If you need the format attribute you still can to do this:
image = Image.open("image_file.jpg") #old image object
resized_image = image.resize([100,200],PIL.Image.ANTIALIAS)
resized_image.format = image.format # original image extension
Read the docs
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