Panasonic PV500 User Manual page 73

Changing the Coordinate Origin and Unit
(Calibration)
Calibration is the function that changes detected data of checkers from pixel unit into actual measure and
moves coordinate origin to a desired position. Calibration can be set by a camera.
After calibration is set, the data detected by checkers is output in calibrated value. Enter the tolerance in
calibrated value in the checkers which detect position (coordinate) or measurement.
Setting example)
The coordinate origin is set at upper left position of the image as the default.
Initial Condition
If the detected coordinate in initial condition is (480, 320), the value turns to be (12, -8) after calibration.
Setting Calibration
Before setting calibration, capture an object or a scale with assured measurement to measure actual size in
pixel unit.
1.
Select the camera No. to set in "Camera" window.
2.
Select "Calibration".
"Calibration" window is displayed.
3.
Set "Calibration" to "Yes".
Now you can set all items.
4.
Input the setting values for "Real Length X"
and "Real Length Y".
If standard object is 10-mm square, enter "10"
either for Real Length X and Real Length Y. Enter
Real Length in your desired unit. The unit does
not have to be "mm".
5.
Input the setting values for "Length X in
Pixels" and "Length Y in Pixels".
If X and Y are 200 pixels as the result of
measuring the standard object, enter "200" either
for X and Y. The coefficient converting unit is
displayed.
6.
After setting is completed, press the CANCEL
key.
Setting example)
Coordinate Axis: Rightward
and upward
Origin: (240, 160)
Calibration:
10mm=200 pixels
(coefficient: 0.05)
After Calibration
71