11-23-2020, 01:19 PM
Whatever you do, it is not going to be very pretty.
You can convert to 8 bit and Indexed Mode with x number of colours and no dithering.
or
Posterizing, the built in Gimp posterize gives more than the specified number of colours. Use the gimp_gmic_qt plugin from http://www.gmic.eu Looks like this with 16 colours. https://i.imgur.com/pNu6W2C.jpg (10 colours looks really awful)
You can convert to 8 bit and Indexed Mode with x number of colours and no dithering.
or
Posterizing, the built in Gimp posterize gives more than the specified number of colours. Use the gimp_gmic_qt plugin from http://www.gmic.eu Looks like this with 16 colours. https://i.imgur.com/pNu6W2C.jpg (10 colours looks really awful)