Scale image, no warning for indexed colors and interpolation labels are unintuitive
Operating System: Windows 10 Home, GIMP 2.10.28
Warning message when indexed colors and opening "Scale Image"
In the scale dialog
Image > Scale image... there are 5 interpolation options; None Linear, Cubic, NoHhalo, LoHalo. When the current image is set to Indexed Colors (
Image > Mode > Indexed) these interpolation options don't really mean anything, because when you scale down the result will always be a pixelated mess.
Which gives more or less the same result, regardless of the selected Interpolation option
I would have expected a warning message when opening the scaling dialog, "Image is set to Indexed Colors, for best results select RGB, see Image > Mode. Do you want to continue?" or something like that.
The labels for the interpolation options are cryptic and unhelpful, I would have expected something like this:
- None (pixelated)
- Linear (fastest)
- Cubic (best)
- NoHalo (high quality)
- LoHalo (high quality)
Those are probably not the correct labels, but I mean anything extra is better than the cryptic "NoHalo" and "LoHalo" it currently displays. Btw the help button page also doesn't mention anything about the NoHalo or LoHalo options.
This would make GIMP more intuitive to use and more user-friendly and this will help in on-boarding new users to GIMP.
I'm no professional but reasonably familiar with image editing and was trying to create an icon for my app, and this took me a good 15 minutes to figure out, trying the different options before realising that the source image was somehow imported as an indexed colors image. I imagine that for the average user this is just another obstacle.