05 October, 2015

How to remove watermarks via GIMP

This is an intelligent way to replace an undesirable object in a picture by its surrounding pixels using GIMP:
  • use the magic wand or lasso tool to select area to be removed (click Strg key to add areas as necessary)
  • chose Select → Grow → 1 pix (if needed)
  • then use either:
    • Clone tool
    • or Filters → Map → Resynthesize…
    • or Filters → Enhance → Heal selection…
      • Specify the radius to take the selection from. The default is 50 and should work fine. If it doesn’t, play around with the radius until you get the desired result.
  • chose Shift+Strg+A to unselect area

Rotate Image:

  • Select the relevant area
  • Press Shift+R
  • Click with the mouse anywhere on the image to bring up the input window
  • Press or chose "Rotate"

Perspective Tool:

Helpful video for using Shift+P. Make sure here to always use "Corrective (Backward)" option.