The Rob Carr Color to B&W Conversion Technique in GIMP
November 22, 2008Design by Fire • Santorini in black and white (scroll down to the The Rob Carr Color to B&W Conversion Technique).
While I was cleaning out Evernote I came across this method for converting photos to black and white and decided to try applying it using GIMP:
Convert to LAB colour: Colors » Components » Decompose… set Color model to LAB
Image mode will already be Grayscale
Highlight Lightness (L) Layer and switch to Channels tab. Ctrl-Click on thumbnail » Channel to Selection
Select » Invert
With the selection still active, convert the image to RGB color, using Image » Mode » RGB.
GIMP doesn’t have Adjustment Layers so what I did turn off the visibility of the A and B layers Ctrl-Click » Create New Layer from Visible
Edit » Fill with a rich, dark colour
Adjust the opacity, levels and/or curves as needed
