Superimposing images & maintaining perspective

M

Mike Rees

New member
I have a project where I need to superimpose traffic lights at a number of intersections where none are currently presents.
I need to maintain perspective of the superimposed images whilst I pan the intersections.
Can anyone steer me in the right direction
 
3d traffic lights and tracking software?

there are some free tracking software you can DL (as in legally) online.

u may be able to DL some 3d traffic lights and depending on your software, should be able to customise integrate pretty well...
 
print a still of your video intersection. Take it into a street with a traffic light and set your camera up so the shot is similar. Then photoshop your street lights into you old video by cutting it form one and matting it, then pasting it into the other. I do these things all the time and it takes a bit of an eye and time to get it all right. Just had to take something out of a commercial that we decided we didn't want it in the background after we first decided we did. It took a bit of time to do but the result is that no one knew that there was something there before. Here is a before and after:

http://www.bluesky-web.com/junk1.htm
 
If it's a pure pan on a locked off tripod you could also do a 2D track and use imges of traffic lights shot from same angle and position.
 
Sorry Walter, Mike needs to maintain perspective of the superimposed images whilst I pan the intersections. a moving shot.

Justin is correct, 3D and tracking software. The photoshop technique won't work with this one.
 
Yeah, you'd be getting a pan/scan style shot; not too pretty.

I'd say 3d traffic lights and tracking is the BEST way to go.
 
If you're purely panning and the lens is nodal or close to nodal then there won't be perspective change. (i.e. 2D solutions can work) That's why you can do pan/tilt on foreground miniatures if your camera is set to nodal. It's also how the better 360 cameras work.
To test set up 2 c stands slightly offset. If you're on nodal the spacing won't change.
Nodal can be center of lens or can be offset forward or back depending on the specific lens.
 
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