I like to use Buckeye's measurement method on trail cam pictures to get a rough estimate on what a deer might score. I measured several mounts on the wall and got reference point measurements then blew up the picture in abobe photo until it matched the measurements then i would measure the picture on the screen and record the measurements. later when we found the shed it was pretty accurate on tine lenght, but it is almost impossable to measure mass in a 2D or flat picture.