There are several modes that a PNG opened in [[Pillow]] can take on. These can have significant consequences for processing channels, transparencies, etc. They are: - P mode - palletized images with one channel. They have an `image_info` dictionary with a `transparency` key that defines which pixels are transparent - PA mode - same as P but with an alpha channel. Not fully supported by Pillow - RGB - 3 channel 8bit, opens as a l * w * 3 matrix representing each pixel - RGBA - same as above but 4 channels, last being alpha for transparency