Ubuntu

gimp nl filter is gray and not working

Asked by Bob

I have been learning how to fix old photos and the NL filter is gray and not working. Yes the mode is set to RGB and still grayed out. I've looked around on the net and that is the only thing I find that says to do that will fix it. Well, that's not it.

Question information

Language:
English Edit question
Status:
Solved
For:
Ubuntu Edit question
Assignee:
No assignee Edit question
Solved by:
Bob
Solved:
Last query:
Last reply:
Revision history for this message
actionparsnip (andrew-woodhead666) said : 		#1

I suggest you post on a GIMP forum. If you are doing many pictures I can suggest you install imagemagick then run:

convert inputfile.jpg -colorspace Gray outputfile.jpg

And you can complete the task using Bash. If you make a for loop, you can do hundreds with one command

Revision history for this message
Bob (smith13) said : 		#2

Oh, thank you I did not know there was a GIMP forum.

Revision history for this message
Manfred Hampl (m-hampl) said : 		#3

see http://docs.gimp.org/en/plug-in-nlfilt.html#idp24413760

"The filter does not work if the active layer has an alpha channel. Then the menu entry is insensitive and grayed out."

Maybe that is the cause.