William,
I believe that you're dealing the "orange" color of the film substrate
of the color negative film. A simple "invert" will not invert to a
"normal" color positive. That orange color must be dealt with (as I'm
sure is obvious to you by now).
I believe that this is what you should review:
https://www.youtube.com/watch?v=Ifwz7vxm4Mc
Simple steps
1. Colors menu > Auto > White Balance
2. Colors menu > Invert
See how that works for you.
To fine tune, Colors menu > Levels > select Black Point or White Point
control and click on image where you know the spot is truly white or
black and Levels will adjust (or use the Auto Levels control to have it
calculate based on the total image).
Guy
On 4/19/21 6:24 AM, William wrote:
Thanks for your appended reply.
I tried the invert function and it is not doing what I want to do.
I want to rescue old color negative 35mm film strips by inverting them to a
color positive that I can print on a color laser printer.
The negatives have an orange cast which inverts to monochrome blue. I tried
some other invert options and could not get a printable photo.
Can you please outline the steps in the procedure to do what I am attempting to
achieve?
Is there a download PDF user handbook or tutorial?
Regards,
William McCreight
-----Original Message-----
From: Liam R E Quin [mailto:l...@holoweb.net]
Sent: Sunday, April 18, 2021 8:10 PM
To: William; gimp-user-list@gnome.org
Subject: Re: [Gimp-user] Rescuing old color negatives
On Tue, 2021-04-13 at 14:35 +0200, William wrote:
Can Gimp 2.10.24 change a color negative image to a printable color
positive image?
yes - colours->invert.
There is also Filters/Generic/GEGL Operation, and then in the pop-up
box choose Negative Darkroom (requires a fairly recent GIMP, e.g.
2.10.24).
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