does anyone know of software that would correctly align a grid in an image:
What I would use it for:
Say I have a photo or scan of a drawing on graph paper. The graph will be more or less distorted depending on means of capture. (Also sometimes the graph-paper itself doesn't have an accurate grid cause of age etc, or sometimes it's photocopied or simply cause it's paper)
-tomos
This might not be exactly what you want Tom, but its related. I use an application called "whiteboard photo" in this circumstance.
Every lesson, I take a photo of the whiteboard Ive been doing maths on. The photos have perspective distortions, as well as looking bad (the white isnt white etc)
Whiteboard photo's purpose is to "clean" those photos by fixing the colour and the perspective problem.
For the latter, it does this by suggesting a moveable trapezium you set around the outline of the board, and this trapezium gets transfomed to a rectangle. (ie eliminating distortion)
Re the colour problem... I have tried setting white balance and messing about in both photoshop and psp ... Whiteboard photo worked much easier and better.
This colour aspect might be relevant to you depending on how you obtained your images (eg photo of a page from a book)
A negative is the price, listed at $249 (go to
http://www.polyvisio...com/products/wbp.asp for info), but note that a long time ago it used to be $79. When I came to buy it, I hunted around and found a place on the net STILL selling it for $79 (I think I searched for "pixid" who used to own the software)
tony