11-01-2017, 10:22 AM
(10-31-2017, 09:45 PM)Dkk Wrote: Currently, using as 2 versions, 2.9 for worker and 2.8 for exporting images to the web, look for open plugin now but as you are not exported to PNG, is there any other plugin with this utility for version 2.9?
Nothing that I know for Gimp 2.9
When it comes to PNG Gimp already uses maximum (9) compression, so the manual alternatives are.
To keep as RGB,
Reduce the number of colours: Colors -> Posterize (with a suitable) value
Scale the image down, or a combination of both.
Convert to Color Indexed, which will reduce the number of colours Image -> Mode - Indexed then export the image.
If you have a constant set of parameters then maybe a plugin will suffice.
(Example: I use one to scale 2/3 and apply a little sharpen, prior to exporting as a 85 quality jpeg. Near enough to put up on imgur.)
There are utilities to optimise a png - search for pngcrush or pngout - but IMHO unlikely to make much difference.