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Cleanup a hand-drawn sketch

Aug 5, 2014, 22:14
Post: #1
Cleanup a hand-drawn sketch
Hi there,

My daughter and I are working on turning our hand-drawn (paper and colored pencils) drawings into something more attractive.

We're scanning the pictures and attempting to clean them up in Gimp. What's the preferred tricks of the trade to streamline this operation?
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Aug 5, 2014, 22:59
Post: #2
RE: Cleanup a hand-drawn sketch
(Aug 5, 2014 22:29)ofnuts Wrote:  Depends a lot on what the scans look like...
Agreed.

If they are just b&w pencil sketches.
Use the 'Scan B&W Photo' or 'Document' setting plus set the DPI to 1200 or so.

But it will be trial and error depending on your scanner and the images.
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Aug 6, 2014, 01:36 (This post was last modified: Aug 6, 2014 01:37 by iForStyle007.)
Post: #3
RE: Cleanup a hand-drawn sketch
If the paper is plain white paper (no blue or black lines)
Then to clean up a majority of dust, some good tools you can use:

Colors > Threshold...
Or
Colors > Levels...
Or

The clone stamp Clone
Or
Heal brush tool Heal

Or
to some degree, the smudge tool Smudge

(*For the clone stamp tool, pick a clean source on your photo then draw over in small parts to clean it up.)

(*The heal brush tool simulates the clean pixels around the cursor/mouse, when it works, it works well, worth a try)

If you want a customized technique, please post a sample or one of the drawings that need cleaning up/enhancing
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Aug 8, 2014, 03:39
Post: #4
RE: Cleanup a hand-drawn sketch
I appreciate the suggestions. These are pencil drawings with colored pencils on top; all done on drawing pad paper (looks like crayon in the scans). I figured this would be a huge trial and error learning experience. But I wasn't sure where to start. I'll let you know how it all goes (especially if I need more help Sleepy).


(Aug 6, 2014 01:36)iForStyle007 Wrote:  If the paper is plain white paper (no blue or black lines)
Then to clean up a majority of dust, some good tools you can use:

Colors > Threshold...
Or
Colors > Levels...
Or

The clone stamp Clone
Or
Heal brush tool Heal

Or
to some degree, the smudge tool Smudge

(*For the clone stamp tool, pick a clean source on your photo then draw over in small parts to clean it up.)

(*The heal brush tool simulates the clean pixels around the cursor/mouse, when it works, it works well, worth a try)

If you want a customized technique, please post a sample or one of the drawings that need cleaning up/enhancing
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Aug 8, 2014, 03:55 (This post was last modified: Aug 8, 2014 03:56 by iForStyle007.)
Post: #5
RE: Cleanup a hand-drawn sketch
(Aug 8, 2014 03:39)harley.333 Wrote:  ...(looks like crayon in the scans). I figured this would be a huge trial and error learning experience. But I wasn't sure where to start. I'll let you know how it all goes (especially if I need more help Sleepy).

One more thing, consider

"Filters > Generic > Erode..."

This will shrink the lighter parts of the lines & make the lines bolder.
*Experiment, the more you erode it, the thicker bolder it will get.

If you need more help just let us know, its not too busy this week, Have fun! Smile
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