autogusto

i have a char (256) grayscale image and i want to scale it to a 2 bit (4 posibilities) image but still using char 256, like scaling this to 4 bit and then to 8 bits, but i'm prety sure that there is something better or a better way to do it.

i think this is an easy question,
i have a char (256) grayscale image and i want to scale it to a 2 bit (4 posibilities) image but still using char 256, like scaling this to 4 bit and then to 8 bits, but i'm prety sure that there is something better or a better way to do it.

char-256-grayscale-to-2-bits-4-grayscale

the following patch comes close to what you're talking about.

however you probably want to use jit.charmap. (also look at jit.map and jit.scalebias)

the following patch comes close to what you're talking about.
however you probably want to use jit.charmap. (also look at jit.map and jit.scalebias)

char 256 grayscale to 2 bits (4 grayscale)