1. A system for processing video information obtained by a video camera based on a representative view from the camera, the system comprising: a processor; and a memory communicably connected to the processor, the memory comprising: computer code for determining a relative depth for at least two different regions of the representative view; computer code for estimating a scale factor for the different regions of the representative view; computer code for determining a unit size for the different regions, the unit size based on the estimated scale factor and the determined relative depth of the different regions.