I hope this is helpful to those who prefer Darktable. When Darktable is closed, the image will be transferred to GIMP for the rest of the workflow, as per the previous tutorial. The solution is to create a new instance of the color correction module, and continue the adjustments in this second instance, which has a cumulative effect on the first: Here, I've equalised the G and B channels at 207, but I've run out of range for R at 245 - I can't move the dot further to the left, and hence can't reduce the R value Moving the dot UP increases (G)reen and decreases (B)lue, and moving it DOWN increases (B)lue and decreases (G)reen:ĭarktable's color correction module doesn't have the range of adjustment offered by RawTherapee's Colour Toning tool. Moving the dot LEFT increases the (G)reen value and decreases the (R)ed simultaneously, while moving it RIGHT increases (R)ed and decreases (G)reen. Click and drag the dot to adjust the balance of R, G and B values. The current (R)ed, (G)reen and (B)lue values will be shown in the color picker drop-down:Īs in the previous tutorial, the aim is to adjust the image until these R, G and B values are equal or close to equal.Īctivate the color correction module. Place the colour picker on the border area. Select the color picker drop-down and click on the eye-dropper: Increase the reproduction ratio to 100% and navigate to an area of the photo's border. In the input color profile module, set input profile to standard color matrix working profile should be left at the default of linear Rec2020 RGB gamut clipping set to off: De-activate all optional modules except for white balance (output color profile, input color profile, demosaic and raw black/white point are permanently activated): GIMP should be configured to use Darktable for importing and converting raw files.Īfter opening GIMP and loading the negative DNG file, the Darktable plugin is loaded.
Please read it with reference to the original tutorial, replacing the RawTherapee steps with those below.
Here, then, is a condensed tutorial for the Darktable variation of the process. Good news for forum members who'd like to try this negative conversion approach but prefer Darktable as their raw converter. The method is basically the same, but with one small wrinkle, which is easily dealt with. I've now figured out how to apply this such that it achieves the exact same result as in RawTherapee. I recently posted a tutorial on conversion of colour negatives with GIMP 2.10 and RawTherapee 5.8, using RawTherapee's Colour Toning tool to remove the film base colour cast.įellow forum member (Jack) informed me that Darktable has the same or similar colour adjustment capability in the form of its color correction module.
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