Converting image to 16bpp?
I'm trying to convert an image to 16bpp with dithering so it can
be used on a 16bit windows display. All the apps on my NetBSD box
happily dither a 32bit image for 16bit display, but Windows ends
up with the traditional 'banding' effect.
The two options I've found so far were:
1) - Decompose the image into RGB
- For each component
- Convert to indexed with 32grey palette
- Convert back to greyscale
- Recompose channels and save.
This gives an image with the right palette, but the
mechanism is clumsy, and the dithering is done
independently on each channel, which is obviously
suboptimal
2) - Use GD to create png with all r5g5b5 values, then ImageMagick
"convert -dither -map $palettefile $infile $outfile".
This works, but the output quality is vastly inferiour
to the Gimp.
Does anyone have an idea how do do this in gimp (or any other way
if necessary! :)
Thanks
