computer programmer to design video measuring system

I need a computer programmer to design a computer system using a camera and computer to provide detail measurements on a two dimensional video screen taken from live dog competition. This is a sport where a dog runs down a dock and jumps into a pool and we measure it for distance. So the video camera would be fixed on the swimming pool. The dog would jump and I want to be able to use a mouse to determine subjectively where the judge thinks the dog landed and click on the screen. That click will translate to an actual measurement. I am attaching a video of the sport in case you've never seen it. Questions, please let me know. I am willing to purchase a license to another program that can be modified for my use. I will pay for camera and computer that goes with it if necessary. Thanks.