Filter to enhance the quality of image

[Krikor]

(05-30-2022, 02:51 AM)Stephen Liu Wrote:

(05-29-2022, 05:01 PM)Krikor Wrote: Maybe you could try:
1- G'MIC - Repair - Unpurple (default values) - Due to the purple tone of your negatives
2- Colors - Linear Invert
3- Colors - Levels - Auto Input Levels

Hi,

Your advice works.  Thanks

Tried your advice again.  Pls refers to attached photos
Smartphone settings: macro and optimize

The result is much better.  Is there anyway to remove the green color on background, not with adjusting RGB curves.  Thanks

(05-30-2022, 10:16 AM)rich2005 Wrote: --------
edit: A bit quicker than the video, a 30 second animation. https://i.imgur.com/vsANS6C.mp4  using the level dialogue. probably as good as you will get that negative.
--------

However if you have used the Gimp sequence for a negative image ➤ auto-white-balance ➤ Linear Invert then you have already applied a auto white balance (from the Colors Auto menu) and of course applying again does nothing.

Pretty much the same as shown in the 30 sec rich2005 video, I just added a black point as well.
So in Colors - Color temperature I lowered the Intended Temperature a bit.
   
In this case, I think you followed the steps in post #33, so as rich2205 commented, it won't make any difference to re-apply Auto Input Levels, as it's been used before.