Panasonic PV500 User Manual page 181

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: Radius, Measurement: Diameter, Measurement: Width
·
Standard deviation (Standard deviation calculated from the result of measurement)
·
Circularity
·
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 the radius of a virtual circle 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". 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:
Uses the edges within the distance specified in
"Denoising" based on the radius of a virtual circle for
the calculation of measurement values.
(Area within the dotted line in Figure 1)
Standard Deviation:
Calculates the standard deviation from the radius of a
virtual circle 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
"Radius of virtual circle +/- Standard
deviation * Denoising range"
The "Standard deviation" used here is
calculated based on the radius of a virtual circle.
It is different from the "Standard Deviation"
displayed on the screen (that is a criterion for
judgement).
Virtual circle
Range of edge
positions used for
calculation
measurement values
Example of edges
excluded by Denoising
function.
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