07-11-2017, 01:44 PM
(07-11-2017, 01:19 PM)broker12 Wrote: I would like to know if GIMP has this feature . . . in photo shop, it' is called removing keystoning from photos of paintings. That's not a genuine name. It's how others talk about this feature.
What removing keystoning does is allow you to straighten up the edges off a photo of a painting. Usually, it is quite difficult to set up a painting so that the photo of it is perfectly square. In photoshop, this is the procedure for removing/straightening the edges of the photo of the painting:
1. Use the crop tool to crop unnecessary space around the image.
2. Select the Perspective tool.
Set the mode to Corrective (Backward).
Click on the image.
Drag the 4 corners of the grid onto the corners of the painting.
3. Use the Scale feature to restore the original aspect ratio of the painting
From the menu bar, use Image > Scale