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Re: software for measurements from video images?



brian whatcott wrote:
I think Bob slipped a factor of two...
. . .
A field is displayed in 1/60 sec, a frame in 1/30 sec.

This is correct - I made an oops!

. . .
We COULD capture a frame of information in 1/1000 sec and play it onto tape
at the slower rate. That's what the manufacturer leads us to expect when he
claims this shutter speed. My references do not clearly substantiate this

**********************************************
view however.
************

Brian
(ref: Electronic Communication. Shrader, McGraw-Hill)

brian whatcott <inet@intellisys.net>
Altus OK

Brian, can you explain just how your references describe the timing
during
exposure and recording; the reference you cite is not readily
available.

As a (perhaps superfluous) caution, let me add that if anyone is using a
vidicon camera (they're still around - I have one), the scene is scanned
during
exposure and takes 1/60 sec. per field (you will see streaking).
We speak here of the CCD camera, in which (it is claimed) the entire
receptor
array is exposed in one fell (simultaneous) swoop (eg 1 ms).

--
Bob Sciamanda sciamanda@edinboro.edu
Dept of Physics sciamanda@worldnet.att.net
Edinboro Univ of PA http://www.edinboro.edu/~sciamanda/home.html
Edinboro, PA (814)838-7185