Banner PresencePLUS P4 COLOR Series - Manual (Page 108)

Scaling Range
Scaling Range allows you to set a range from a low of 0.8 to a high of 1.2. In Run mode, this will enable matches to
occur even with slight variations in shape from the reference shape.
Tool Timeout and Absolute Positioning
Set a timeout in milliseconds that determines how long the Geometric tool will attempt to determine whether a pattern
is good or not.
Select Force to Absolute Positioning if you want to change the Geometric tool from relative positioning to absolute.
Results
The Results field returns the following:
• Total number of shapes above the minimum acceptance level.
• Position of each shape's center. The origin (0,0) is the upper-left corner of the screen.
7.2.3 Pattern Find Tool
The Pattern Find tool locates the first shape in a search area of the image. During setup, identify a section of the image
containing the target shape, and assign that shape as the reference for the Pattern Find tool. This reference shape is
subsequently used to locate the target shape in new images by searching for shapes very similar to the reference one.
The shape is remembered by the sensor in full gray scale detail, and the search is conducted in a way that is “normalized”
or indifferent to variations in the level of illumination.
Tools that follow the Pattern Find tool translate and rotate their ROIs relative to positional information from the Pattern
Find tool. Pattern Find returns the location of the first shape found.
Usage
• Match letters and numbers
• Locate a fiducial on a circuit board
• Spot-check for an object
Note: Only one target shape is found in the search area. Only the ROIs that follow a Location tool will move
relative to the Location tools.
Banner Engineering Corp. Minneapolis, MN USA 108
2/2010 PresencePLUS Software Tools