1
1-bit bilevel, stored with the leftmost pixel in the most significant bit.
0 means black, 1 means white.
1;I
1-bit bilevel, stored with the leftmost pixel in the most significant
bit. 0 means white, 1 means black.
1;R
1-bit reversed bilevel, stored with the leftmost pixel in the lease
significant bit. 0 means black, 1 means white.
L
8-bit greyscale. 0 means black, 255 means white.
L;I
8-bit inverted greyscale. 0 means white, 255 means black
P
8-bit palette-mapped image
RGB
24-bit true colour, stored as (red, green, blue)
BGR
24-bit true colour, stored as (blue, green, red)
RGBX
24-bit true colour, stored as (blue, green, red, pad)
RGB;L
24-bit true colour, line interleaved (first all red pixels, the all
green pixels, finally all the blue pixels)