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Perspective correction - 02-08-2011 , 06:10 AM


I'm working on a project where I need to correct the perspective of an aerial image that wasn't taken looking straight down. I know the exact angle at which the camera was looking (85.5 down), is there a way to figure out exactly how much I should correct the image by so that it appears as though it was taken looking straight down? I'm usng Photoshop's Edit -> Transform -> Perspectve tool. Ultimately I want to stitch the images together and I know it won't work right if I don't have the right perspective. It doesn't have to be absolutely perfect, but the 4.5 between where I'm at and straight down is too much to get a good stitch.

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02-08-2011 , 01:37 PM


The first step would be to find the axis along which the 4.5 is offset, then I don't know what to do next. Just do schlapskie until you can align multiple images together properly, and by that I mean set the opacy of one image to like 60% and try to line it up with another image.

Good luck with that, but I only know how to modify graphics as far as rotation matricies.

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02-08-2011 , 08:49 PM


Well if it helps, it's rotated 85.5 degrees down, another 4.5 degrees and it would point straight down. Unfortunately ir's in Halo so I can't look straight down.

 

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