Software to convert negative to positive

[measekite]

I am looking for Linux software with a GUI frontend that can convert a negative (tiff, png, jpg) into a viewable positive photograph that can then be edited or printed.

Is there such a thing?

[kai12]

Have you looked at The GIMP?
Layer -> Colors -> Invert should do the trick.

cheers, kai

[measekite]

Have you looked at The GIMP?
Layer -> Colors -> Invert should do the trick.

cheers, kai

I use Gimp all of the time. Layers>Colors>Invert just changes the orange negative to cyan. It does not work.

[kai12]

Sorry to hear that.

I still think it *should* work, I double-checked by converting a scanned negative from this tutorial (for photoshop), and The Gimp inverted it to pretty much the same image as in said tutorial.

I tried imagemagick (convert with the -negate option), too, which produced about the same result.

My guess is that this is not a software issue but specific to your negatives - I would seek help in forum on digital photography, maybe here. Maybe you need to do some filtering to get the right colors.

cheers, kai