I have been working via the Internet for international clients for the past 15 years. I usually provide mathematical consultancy for a wide range of fields including object detection.
I will be using a number of peer-reviewed references to find the most optimal solution to your problem. Just to show you what quality you an expect, please read the following paper on use of triangulation in object detection by passive devices such as cameras.
1. A unified approach for multi-object triangulation, tracking and camera calibration, Jeremie Houssineau, et al, 2014.
Thanks,
Sumanta.