Banner PresencePLUS P4 COLOR Series - Manual (Page 117)

Blob Find Filter/Sort Tab
Blob Sort
The Sort drop-down list allows the user to select a sort method to determine which Blob the sensor labels as "Blob
#1." By default, Blobs are numbered according to scan order; that is, the sensor numbers Blobs as it encounters them
while scanning the FOV from top-to-bottom and then left-to-right. Select one of the computed statistics choices from
the drop-down list to use for the sort:
• No sorting
• Position
• Area on page 183
• Perimeter on page 184
• Compactness on page 185
• Major Axis Length, Minor Axis Length, and Major Axis Angle on page 185
• Eccentricity on page 185
• Min Radius and Min Radius Position on page 187
• Max Radius and Max Radius Position on page 187
Blob Sort Order
Once you select a Sort method, you need to define a Sort Order:
• If Position is selected for the Sort method, then Blob order is based on the x,y coordinates of the centroids and the
options are—
• Left most
• Top most
• Right most
• Bottom most
• For any of the other options, Blob order is based on Increasing or Decreasing value of the parameter selected. For
example, if Perimeter and Increasing is selected, the smallest perimeter Blob will be Blob #1.
Blob Filter
The Blob filter allows you to more accurately select a specific Blob to locate and to use for positioning other Vision
tools. Filter modifies the Blob count based on Computed Statistics criteria so that, for example, only circular Blobs
(compactness) or symmetric Blobs (eccentricity) are included in the Blob count.
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PresencePLUS Software Tools 2/2010