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Panasonic A230 User Manual page 231

Machine vision system

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OCR Type A230
13.2.2
Conversion Data Setup
Procedure:
1.
First, measure the reference target object (a scale or calipers will be useful).
For this measurement use an edge detector to obtain the number of pixels
between the gradations.
Example: 1000um = how many pixels?
Edge detection checker
2.
Select CONVERSION DATA from the Menu screen, input the number for the
conversion data (CV01 to CV04), and press ENTER.
First, input the distance between the scale measurement gradations as the
Reference Distance.
3.
Next, input the number of pixels between the scale measurement gradations
obtained in step 1.
4.
When you finish inputting the number of reference pixels, the scale factor is
calculated automatically.
Note
The four sets of conversion data set in CV01 to CV04 (reference
distance, number of pixels, and scale factor) are not initiallized
even if the data for all types is initiallized. To initiallize the
conversion data, either initiallize the environment data, or
individually delete each item by moving the cursor to it and
pressing the B: Delete button.
Scale
Inspection Results and Output
13.2 Conversion Data
13 − 5

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