Video Inspection Software User’s Guide
Pattern Recognition The pattern recognition function teaches specific image patterns to the system for automatic detection during program playback. Program playback can be improved using a soft-fixture based part alignment routine, utilizing this pattern detection mechanism. Patterns can be measured, or taught, as datum patterns where the skew and zero positions are set automatically or as standard pattern features where the part or machine coordinate pattern position and orientation are reported for the pattern feature. Teaching a pattern Select the desired pattern to be used for detection in playback. Ideal candidate patterns should contain image characteristics that are unique relative to the rest of the field of view in which they are taught. In addition, target pattern regions should contain reasonable light to dark pixel contrast and be relatively free of image noise and distortion. To teach a pattern: 1 With the desired pattern in the field of view, press the Datum button in the Measure Toolbar to display the Datum Pattern Menu. 2 Press a Pattern Probe to initiate a pattern measurement. 3 There are two pattern measurement types: • Datum pattern measurement (default type) • Standard pattern measurement Datum Pattern Measurement This is the default pattern measurement and sets the measured pattern feature to XY=0 and angle=0. To measure (or teach) a datum pattern: 1 Select the Measure Datum Pattern tool (default), press and drag to completely enclose the desired pattern. The pattern feature will be shown in the Feature List, and the pattern position and angle will be shown in the detail view, with position and angle set to zero. The pattern will be registered for Program playback as shown in the Part View, and other features can be probed.
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