Kodak EKTAPRO EM 1012 - Page 79

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5.25
HOW TO DO TIME AND DISTANCE
CALCULATIONS
Establish the number of pixels per unit of distance in the plane of
the motion to be analyzed using the following procedure:
Place a scale in the picture next to the subject to be analyzed.
Place a Reference Mark at one end of the scale and position the
reticle at the other end. Divide the number shown in the D field
in the DATA-FRAME Border by the number of units on the scale.
The result will be pixels per unit distance.
1.) Make a recording of an event.
2.) Place a Reference Mark in the frame at the start point of
the action.
3.) Move to the frame containing the end point of the
action.
4.) Position the Reticle at the end point.
The D field in the DATA-FRAME Border will contain the linear
distance in pixels that the subject moved. The Elapsed Time field
will contain the time from start to finish in seconds. If you have
calculated the scale factor, apply it to the distance in pixels.
X
Y
FRAME -84
ET
-
000001.6800
PLAY 30
TRIG
ROC
SYNC
ID
02
REC
50
EXP
50
IMG
B/1
X
40
Y
30
D
050.0
PIX
256
TIME 12:19:06 DATE 05/21/91
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