Owner manual

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.

117Minneapolis, MN USABanner Engineering Corp.

PresencePLUS Software Tools2/2010