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6.8.2 What Is Feature Extraction?
Feature Extraction is a function to count the number of the clusters (called as an object) of a certain size within
the area. If the number of counted objects is within the preset limits, the object will be judged as "OK", if the
number of counted objects is out of the preset limits, the object will be judged as "NG". The detected objects are
sorted and the "features" of clusters from 1st to 99th are extracted.
Area Shape
The number of Settable Mask Areas
The Range of Measurement Results
Feature Data and Measurement
Results Range
Detection count = 3
Features of object 1.....
Features of object 2.....
Features of object 3.....
*1
•
For rectangle-, circle- or triangle-shaped objects, the PV310 cannot compute the angle of the principal
axis. (The device might possibly output the angle of the principal axis "180.0", but you cannot use the
data due to its incorrectness.)
•
If the number of detected objects exceeds 2000, inspection error occurs and an error code No. E0073 is
displayed in the message area (No ERROR signal will be output.). In this case, Detection Count "0" is
output.
Rectangle/Circle/Polygon (The number of
settable vertices: 3 to 16)
Up to 16.
Detection Counts: 0 to 2000
Area
1 to 245760
Gravity X
0 to 511.9
Gravity Y
0 to 479.9
Projec. W in X
1 to 512
Projec. W in Y
1 to 480
Perimeter
1 to 245760
Angle
-89.9 to 90.0, 180
The Area Size
Adjustment function is
available.
Automatic detection
Possible to switch
Detect/Not Detect
(Under the Search
Method tab)
*1
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