Originally Posted by Brutus
It seems to me that you don't understand exactly what it is QuesTech was and did. QuesTech's sole purpose was to snap 3-D imagery of each pitch on called balls or strikes to send back to Major League Baseball for evaluation of umpires. The operator would take a snapshot on each pitch and record the log, and the data would be saved to a CD-Rom along with video so MLB could evaluate. Thus, QuesTech's claim was 97% accuracy of the zone. That's it. There was no "within an inch" as their sole designation was to simply say 'in' or 'out' of the strike zone. That was their purpose.
Hence, the reason, then, MLBAM switched to Pitch F/X in all the parks had NOTHING to do with accuracy. It was because the Pitch F/X technology supported by Sportvision simply expanded the capability. Instead of simply grading umpires, the system was meant to capture pitch locations, trajectory and velocity and be used in a versatile interface that was compatible with MLBAM's desire to incorporate online and statistical aspects of the sport. That is why they switched. They could incorporate all of these features while still grading umpires.
Here is the most amazing aspect of all of this that people are missing... this technology to work relies on human input. Did anyone stop to wonder how the strike zones are defined in QuesTech or the "Z-system" that Pitch F/X uses? If you guess HUMAN OPERATOR, you would be correct.
That's right... the technology everyone is pining for still relies on a human to manually set the strike zone before each at-bat. While the technology captures the location of the pitch at 99% accuracy "within an inch," whether that location is in the strike zone is dependent on a HUMAN operator calibrating the zone prior to each at-bat. So even if a given pitch is 100% accurate as to its true location, the relative location as it fits within the strike zone is set by an operator prior to the at-bat meaning that if the human makes an error, it will impact the accuracy of the location of the pitch relative to the zone.
I'm not against technology. But the problem is people talking about how it's "proven" clearly don't know how the system operates. The entire accuracy of the system with a strike zone is based on the operator manually setting the parameters correctly prior to each batter stepping in the box. If the system is set wrong by even an inch or two, then you've basically not improved anything other than consistency of the error margins.
So now you do finally acknowledge that Pitch F/X is vastly superior to the QuesTech system that you were espousing earlier. At least we are making progress there. There is no need to talk about Questech any more since it hasn't been in use for years. MLB upgraded to Pitch F/X, which everyone agrees has been proven to be far more effective and accurate as well as having many more features. The technology for measuring balls and strikes has been getting better, which is exactly the point I was making.