Match the perspective lines of a photo reference

[raphael.sicard]

Hello !

 Do you have a method to easily match the perspective lines of a photo reference ? 

And if I'm doing a perspective wall, and I need to put railings on the wall, there is a method that could match the railings to the perspective wall without them having any contact between them ?

Thank you all for your answers and I wish you a good day

[hamsterHamster]

"easily match" - you can just do approximate eyeballing, nothing precise. Have you had a video, instead of a single frame, AND camera data AND survey data, this could have been done in any 3D tracking software.

Complex things short, in your case, I'd create a pCube with some 20 divisions in every direction and in the wireframe mode look trough it to the camera imagePlane with the reference photo. And then it is all about moving the camera, changing it's focal length iterating it again and again, until I'd get best perspective matching edges.

If the image comes straight from the camera, I'd wish to look in its metadata, as it contains the camera model, where the filmback size can be found out, and the focal length, which then saves its finding step. Also, the real mesurements (sizes, distances) from the location help a lot, so you can place additional objects into scene so the pCube isn't the only guide.