RECOGNIZING THAT THE STRIKE ZONE HAS THREE DIMENSIONS. I posted here about misgivings I had about the accuracy of the camera and the related algorithm which are used to call balls and strikes. One reason was that the strike zone has three dimensions. A pitch is a strike if it crosses only the front part of the plate or only the back half of the plate.
Nick pointed out to me that there are now cameras that will image home plate in three dimensions. The article by Cork Gaines shows the three-dimensional “k-zone” which ESPN has introduced this year. Gaines acknowledges that as of now the three dimensional k-zone would not be available for several seconds. However, this additional improvement should be available on an instantaneous basis by the time baseball is ready to have computers call balls and strikes.