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I'm trying to improve the quality of reduced screenshots of websites in GIMP.

This is waht I do:

  1. Scale the image using the Sinc interpolation.
  2. Apply some blur (0.5)

This is the result:

enter image description here

I would like to know if the quality of my result is closer to this one:

enter image description here

If not, what other techniques do you recommend to improve the screenshot?

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1 Answer

Sinc is broken.

Try this:

  1. Figure out ratio between source image and final image (e.g. 1200px width to become 600px give you 2
  2. Apply Gaussian blur with that value
  3. Scale down with linear interpolation
  4. Apply sharpening to your liking
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