I believe this is a very solvable problem. From ze rules: I think it's safe to round the strike zone off to a rectangular solid.. I suppose a breaking ball could clip the point at the back, so for argument's sake, keep it a 5 sided solid, which a single camera from above can easily detect. A computer can determine where knees, shoulders, and pants are fairly easily with various image recognition. The only trick I can think of is when to capture the upper and lower bounds of the strike zone, and a warm body can do that if you sync a camera to the pitcher. Even if a computer can't figure the height automagically, let the warm body do that for each player.. at the beginning of the at bat, or game, or once a year. With the right definition, it's no longer subjective.