wide-angle perspective correction in P-shop??

[edub]

I'm sure in my mind I've come across this once a while back, but I can't remember where:

 

I'm looking for a tutorial on how to correct a photo in Pshop to get rid of wide-angle distortion (i.e. 3-point perspective, but with a curvature).

 

Is there a way, in P-shop, to manipulate the image to get straight, vertical lines, with 2 vanishing point?

 

Will this result be ok for setting up a camera (in Cinema 4D) using perspective match... or will the perpective now be too manipulated?

 

Moderator: I'm not sure if this is the right place to post it, so feel free to move to appropriate forum.

[Ernest Burden III]

Andromeda's LensDoc corrects both, plus correcting for rotation. However, in some cases it has to be done twice if the perspective is in both X and Y (usually only need that when taking a sign back to rectangular).

 

As for a camera match on the results, well...haven't tried it yet. But the results should be correct. Of course you would need to get the correct film offset in C4D's camera which could be tricky.

 

I would suggest using a copy of your corrected image with the horizon and other important lines drawn over it to make the task easier. AND, once you have gotten the C4D camera as close as possible, distort the background photo to match the render, not the other way around.

[edub]

wow, looks like it'll do exactly what I need...

 

but $100 for that plug-in? isn't there a way to do what that program does using standard p-shop tools/ filters?

 

edit:

 

Googling "wide angle correction photoshop" yielded the following link:

 

http://www.dpreview.com/learn/?/Image_Techniques/Barrel_Distortion_Correction_01.htm

[edub]

this is a free 15-day trial of the lens fix plug-in:

 

http://www.kekus.com/plugin/#correct

[Richard Rush]

I don't know about older versions of Photoshop, but the latest (CS2) has Lens Correction. You can simultaneously adjust for pincushion/barrel distortion, vertical/horizontal perspective, rotation, chromatic aberration, and vignette. It's location is: filter/distort/lens correction.

 

Richard

[William Alexander]

ptlens.....it's a free PS plugin. Works well.

 

If you camera match a corrected image, you don't always match the original. Did some single image cam matching (long hand reverse technical perspective) and had a helluva time dealing with lens distortion of the reference images. Used the ptlens to correct....the resulting cameras where way off, uncorrected to corrected.

 

WDA

[ballus]

Maybe Richard Rosenman's plugin could be useful to you

 

http://www.richardrosenman.com/photoshop.htm