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Affinity Photo: Removing the background


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Hello everyone,

I have been given a drawing consisting of lines drawn with a black felt pen on a white sheet of paper.

How can I remove the background as cleanly as possible?

Here is a felt-tip image taken from an Artlabel video.

maxresdefault.jpg.0346721f8064f92de2c9cf41b4322ef8.jpg

Thank you for your explanations.

6 cœurs, 12 processus Windows 11 pro   4K DirectX 12 Affinity Desktop Publisher, Affinity Desktop Designer, Affinity Desktop Photo.

Mais je vous le demande, peut-on imaginer une police sans sérifs ?

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  • I'd use a HSL Adjustment filter to desaturate the image
    image.png.ca8414b1abada4af5a32860bffa6c2f8.png
  • Use an Exposure Adjustment filter with a linear gradient to even out the dark left and light right.
    image.png.110cb3694ca080213d25b49f77a2b856.png
  • Use Merge Visible to get a resultant layer
    image.png.591909454e4afb51d627d16d755f8870.png
  • Use Filters > Colours > Erase White Paper
    image.png.8f62abcc984f2a832d05eaf3aaf66e3d.png

 

iMac 27" Late 2019 Fully Loaded and running Monterey 12.6.1, iMac 27" Late 2013 running Catalina 10.15.7 - Affinity Designer, Photo & Publisher V1 & V2, Adobe, Inkscape, Blender, C4D, Sketchup + more... XP-Pen Artist-22E, - iPad Pro 12.9 B|  

Affinity Help - Affinity Desktop Tutorials - Feedback - FAQ - most asked questions

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So, the menu Color/ Erase white paper is not the best method?

6 cœurs, 12 processus Windows 11 pro   4K DirectX 12 Affinity Desktop Publisher, Affinity Desktop Designer, Affinity Desktop Photo.

Mais je vous le demande, peut-on imaginer une police sans sérifs ?

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Depends what you want out of it, but that filter immediately will not remove the darker portions of the background on the left, Erase white paper is literal in so much as it has no control and requires a bright white to get good results, the left side is not white, it's grey, so you get this haze effect.

If you want to keep the hand in colour you can mask it out.

 

iMac 27" Late 2019 Fully Loaded and running Monterey 12.6.1, iMac 27" Late 2013 running Catalina 10.15.7 - Affinity Designer, Photo & Publisher V1 & V2, Adobe, Inkscape, Blender, C4D, Sketchup + more... XP-Pen Artist-22E, - iPad Pro 12.9 B|  

Affinity Help - Affinity Desktop Tutorials - Feedback - FAQ - most asked questions

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Thank you very much Firsdefence for this clarification.

6 cœurs, 12 processus Windows 11 pro   4K DirectX 12 Affinity Desktop Publisher, Affinity Desktop Designer, Affinity Desktop Photo.

Mais je vous le demande, peut-on imaginer une police sans sérifs ?

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I just tried adding a background colour, which I had not done before.

After the Exposure Adjustment filter:

  1. Add a coloured rectangle in front.
  2. Merge with the visible layers.
  3. Colour/Delete the white paper.
  4. Merge with the visible layers.

Is there anything easier?

6 cœurs, 12 processus Windows 11 pro   4K DirectX 12 Affinity Desktop Publisher, Affinity Desktop Designer, Affinity Desktop Photo.

Mais je vous le demande, peut-on imaginer une police sans sérifs ?

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For black and white art, I'm always a fan of using the art as it's own mask.

If you create a black pixel layer, you can Rasterize to Mask the art work, invert, and nest. An added Levels Adjustment set to Alpha will help even out the black and white (though some added brush work might help as well). And then a colored background completes the stack.

Extra advantage is that the black line art can be any color you want just by changing the fill color of the black layer.

 

Screen Shot 2022-09-19 at 12.41.42 PM.png

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