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Remove Colour GIMP

 

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Remove Colour From Images (5 Methods)
GIMP (GNU) -
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Desaturate Images GIMP

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This GIMP (GNU) tutorial demonstrates five difference ways of removing an image’s colour. To work along, you are welcome to download the Start Image I am working with HereUnzip the file and open the image onto GIMP’s workspace.

Notes
You can quickly Undo a step at any time by pressing Ctrl then Z. Alternatively, click a previous Undo History snapshot - Windows then Dockable Dialogues then click Undo History. In addition, to Zoom in (or Zoom out) of your image; from the top menu, choose View then select a Zoom Tool from the subsequent drop-down list.

Launch GIMP & Organise Its Workspace & Palettes

Colourise Filter
Desaturate Filter
Channel Mixer Editor
Hue-Saturation Editor
Black And White Gradient
High Contrast Black & White (Dodge & Burn Tools)

Note
Every photograph is unique and will always react differently. Therefore, for personal results, experiment with different settings, until you find the right result for your image.

1/
Open your Start Image onto GIMP’s workspace - File then Open - Ctrl then O.



Note
Ensure the Layers and the Undo History Palettes are visible, and then drag them into position over your workspace - (Windows then Dockable Dialogues - then click Layers and Undo History).

Desaturate Filter: Method One
From the top menu, choose Tools then choose Colour Tools and then choose Desaturate. And from the subsequent Desaturate dialogue box, mark either, Lightness, Luminosity or Average, and then click OK.





Note
Return your image to its original colourised state by tapping Ctrl then Z.

Hue-Saturation Filter: Method Two
From the top menu, choose Tools then choose Colour Tools and then choose
Hue-Saturation. And from the subsequent Hue-Saturation dialogue box, drag the Saturation slider all the way to the left, and then click OK.





Note
Return your image to its original colourised state by tapping Ctrl then Z.

Colourise Filter: Method Three
From the top menu, choose Tools then choose Colour Tools and then choose Colourise. And from the subsequent Colourise dialogue box, drag the Saturation slider all the way to the left, and then click OK.
 




Note
Return your image to its original colourised state by tapping Ctrl then Z.

Channel Mixer: Method Four
This command combines values of the RGB channels. It works with images with or without an alpha channel. It has monochrome mode and a preview.

Now, from the top menu, choose Colours then choose Components and then choose Channel Mixer. And from the subsequent Channel Mixer dialogue box, mark the Monochrome box, and then click OK.

Note
For personal monochrome adjustments, experiment with different Red, Green and Blue (Channel) values. If you don’t like the result, then click the Reset tab and start again.





Note
Return your image to its original colourised state by tapping Ctrl then Z.

Gradient Method: Method Five
Now, set the Foreground and Background Colour Swatches to Solid Black and Solid White respectively, by tapping your Keyboard’s D Key.



Then from the left-side Toolbox, activate the Blend Tool.



And set the following Foreground to Background (FG to BG RGB) Gradient and Saturation Mode settings into the left-side Toolbox.

     

Now, left-click over your image, and drag a Gradient Line over it. 
 


As soon as you release your mouse button, the following (transparent) Black and White Gradient will be applied to your image.



2/
After you have applied your choice of desaturating filter, from the top menu, choose Filters then choose Enhance and then choose Unsharp Mask. Now, from the subsequent Unsharp Mask dialogue box, enter the following settings, or experiment, and then click OK.



Desaturate Images GIMP


3/
Congratulations, your work is complete,
and it is ready to save - top menu, then File then Save As. GIMP 2.8 - File then Export.
 

 



Wendi E. M. Scarth. 
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