Pete Mc Nally's Blog

Following on from my earlier Photofly work I decided to knock out a quick test to see how the model would fare fare when composited onto a live action backplate. I took to the back yard once again on a day that had similar weather and lighting (dull and grey – the Irish summer) and shot some footage handheld on an old JVC Everio camcorder. I chose this over my HD camera because it has a CCD image sensor that eliminates any rolling shutter artifacts, making it more suitable for tracking/matching. The downside is that it records to interlaced mpeg in standard definition, so I took it through virtualDub to remove the interlacing then converted to mp4 for ease of use. Matchmoving was then done in SynthEyes to generate a camera for the 3D scene that would match that of the backplate, I didn’t bother setting up markers or measuring as this was a quick test.

Here is the backplate:

And this is the Photofly tunnel model composited into the shot:

The model just uses the diffuse textures created through photofly with no lighting except for a simple ambient occlusion pass, which hasn’t properly darkened the underside of the model, so it doesn’t fit in perfectly but as a simple test I think it holds up OK. Further work could be done on the model shaders, colour correction and motion blur.

~ by petemcnally on September 29, 2011.

Posted in Personal Work
Tags: autodesk, camera matching, camera tracking, compositing, matchmoving, Photofly