[Gimp-user] "Squaring up" an Image - Perspective Transform Changes Sizes

2004-01-22 Thread Steve Strobel
I am trying to "square up" an image. It is a scanned map which shows section lines representing a one mile square. Because of the map projection, the section lines on the map aren't quite square (opposite sides aren't even quite parallel). I am trying to "square up" the image so I can overlay

Re: [Gimp-user] "Squaring up" an Image - Perspective Transform Changes Sizes

2004-01-22 Thread pcg
On Thu, Jan 22, 2004 at 12:43:18PM -0700, Steve Strobel <[EMAIL PROTECTED]> wrote: > I tried using the perspective transform to adjust the corners of the image so the > section lines would be horizontal and vertical. That's actually correctly doing what the perspective transform is doing (try to

Re: [Gimp-user] "Squaring up" an Image - Perspective Transform Changes Sizes

2004-01-22 Thread Gene Heskett
On Thursday 22 January 2004 16:18, [EMAIL PROTECTED] ( Marc) (A.) (Lehmann ) wrote: >On Thu, Jan 22, 2004 at 12:43:18PM -0700, Steve Strobel <[EMAIL PROTECTED]> wrote: >> I tried using the perspective transform to adjust the corners of >> the image so the section lines would be horizontal and ver

Re: [Gimp-user] "Squaring up" an Image - Perspective Transform Changes Sizes

2004-01-22 Thread Steve Strobel
Thanks for the quick reply. The shearing transform works great for what it does, but it can't help when the opposite sides aren't parallel; it always moves them together. Imagine drawing a "square" with straight lines but with none of the corners quite 90 degrees. Rotate it until the top is