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Research
at the Setpro Training Center
The
following is taken from a post in the SETPRO MEMBERS PITCHING FORUM
and is an example of what is/will be happening at the SETPRO TRAINING
CENTER.
After
talking with TG2 about the APAS system
and the "pro's-con's" as to the real value of doing this
analysis, I decided that it would be something "interesting"
to try (add something of "interest" to the web site).
When
the "troops" come home for Christmas break (Tim, John,
Alex, Eric, etc), I will be set up to do analysis using the APAS
program for motion capture.
Before
everyone "rushes out" to set up their own APAS system,
beware that it is not as easy (or fast to digitize and perform an
analysis as you think, i.e. it's not a "real time" teaching
system).
It's
inteneded for researchers as opposed to instructors.
 Here's
and example of the type of set up that is necessary (I'll admit,
more elaborate than necessary).
The
"steel cage" is a 'calibration cube' necessary to calibrate
the camera-APAS interface.
The
calibration cube is placed in the position of the activity and at
leat 6 non-colanar points must be digitized for the two cameras
(a minimum of two cameras (two simultaneous views (video sequences)
are necessary for each analysis)).
The
cube is only necessary to shoot a couple of frames to establish
a calibration standard.
The
cube is removed, settings of cameras are not touched and the player
does his thing where the cube WAS.
The
cube is not absolutely necessary, but at least 6 accurate non-coplanar
points are necessary. And the x,y,z coordinates for each calibration
point must be entered (at least 6 non coplanar points).
What
I hope to do is compare the dynamics of each players biomechanics.
I'm
sure I'll learn something, you always do, but the question is (Tom
and I "debated" the "value" of doing something
like this, as a "for instance", Tom House has been doing
this type of analysis for almost 20 years and he still has to appologise
for teaching the wrong stuff (Pitching Malpractice article in Collegiate
Baseball about 12 months ago, The Pitching Edge 2nd edition)).
Anyways
it's got computers, pitching and video tape. With that combination,
if nothing else, it should be fun.
As
a "prcatice/learning exercise, I am going to take Maxman Nolan
Ryan, use the above calibation cube, create two views at 60 frames
per second and digitize them, and compute the stick figure results.
Then
I will compare the dynamic's (postions, angular velocity, displacements,
etc) that I got from the APAS analysis to the parameters in the
Maxman Nolan program.
Then
if anyone wants these clips (Maxman, calibration cube) to play with
the APAS program, I will supply them so that you can do your own
digitization).
And
yes Gideon was my track (field events coach) at UMASS.
Stay
tuned!
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