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|PNG is a format that can be used to store images in a lossless compression format.
This means that a PNG image viewer is able to display the original image colors. This is different from the JPEG lossy compression algorithms that do not guarantee that the original colors can be recovered after decompression.
This property of PNG lossless compression can be used to transmit arbitrary data in a compressed format inside PNG images.
This class make it easier to take advantage of this possibility by generating PNG images that embed arbitrary binary data.
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