PngSuite - Basic formats / PNG-files
black & white
2 bit (4 level) grayscale
4 bit (16 level) grayscale
8 bit (256 level) grayscale
16 bit (64k level) grayscale
3x8 bits rgb color
3x16 bits rgb color
1 bit (2 color) paletted
2 bit (4 color) paletted
4 bit (16 color) paletted
8 bit (256 color) paletted
8 bit grayscale + 8 bit alpha-channel
16 bit grayscale + 16 bit alpha-channel
3x8 bits rgb color + 8 bit alpha-channel
3x16 bits rgb color + 16 bit alpha-channel