A possible solution could be to import a fixed palette. You can create a palette of 16 shades of gray. When the palette is imported into Irfanview, the colors in the picture will be replaced with the nearest colors in the palette. There is no dithering applied.
The palette file format is a simple text file, so it can be easily edited.
An example of such palette file:
The palette file format is a simple text file, so it can be easily edited.
An example of such palette file:
Code:
JASC-PAL 0100 16 0 0 0 17 17 17 34 34 34 51 51 51 68 68 68 85 85 85 102 102 102 119 119 119 136 136 136 153 153 153 170 170 170 187 187 187 204 204 204 221 221 221 238 238 238 255 255 255
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