: Restore image with negative colors I have an image that was taken using a negative color filter long ago, but now I need the normal picture, is there a way to get a good quality of that

@Radia289

GIMP has an invert command you can apply to RGB and Grayscale images:

to

You can acces it through Colors → Invert.

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@BetL875

We may be talking about a scanned color negative film stock widely used way before the invention of digital cameras.

These images had a yellow and a red mask for color absorption. Hence negatives had an orange rather than a white tint:



Image source: Wikipedia cc

To obtain a positve color image from these sources we have to


Remove the orange mask


Colors > Pick white point: choose an area outside the image



Invert the colors


Colors > Invert



Adjust colors (many negatives will have a heavy blue tint):


Colors > Pick gray point: choose a gray area from the image





Note: removing the orange mask will unfortunately lead to a reduced pixel information as compared to color scans.

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