Panasonic PV500 User Manual page 197

Setting Judgement Condition
Perform judgement for the following four conditions respectively. When all the conditions are met, the
judgement result of the checker will be OK.
·
Measurement: Deviation, Measurement: Distance or Measurement: Width
·
Standard deviation (Standard deviation calculated from the result of measurement)
·
Linearity
·
Unused Edge Count
Setting Denoising function
About Denoising function
Measurement values are calculated using the edges detected by
each cell. However, if cells detect projections, concaves on the
surface of the object or noises existing around it as edges, using
this function enables those edges not to be used for calculating
measurement values. This is "Denoising Function".
Only the edges within a distance or standard deviation specified
based on an approximate line are used for the calculation of
measurement values.
About Unused Edge Count
In Denoising function, edges excluded from edges to be used for
calculation and cells which cannot detect edges are called
"unused edge", and edges used for calculating measurement
values are called "used edge". The number of each edge is
displayed in the left of the screen together with the judgement
result of checker.
1.
Select "Judgement Limits" > "Denoising".
2.
Use either "Distance" or "Std. Devi." for
performing "Denoising".
Distance:
Use the edges within the distance specified in
"Denoising" based on an approximate line for
the calculation of measurement values.
(Area within the dotted line in Figure 1)
Standard Deviation:
Calculates the standard deviation from an
approximate line and the edge coordinates
detected by each cell, and uses the edges within
the value calculated by the formula mentioned
on the right.
(Area within the dotted line in Figure 1)
Figure 1
"Position of approximate line +/- Standard deviation *
Denoising range"
The "Standard deviation" used here is calculated based
on each coordinate value of an approximate line.
It is different from the "Standard Deviation" displayed on
the screen (that is a criterion for judgement).
Range of edge
positions used for
calculation
measurement
values
Approximate line
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