National Instruments IMAQTM User Manual page 56

Chapter 5 Performing Machine Vision Tasks
2
3
a.
1 Search Area for the Coordinate System
2 Object Edges
IMAQ Vision for Visual Basic User Manual
1
4
3 Origin of the Coordinate System
4 Measurement Area
Figure 5-2. Coordinate Systems of a Reference Image and Inspection Image
b. If you use
CWMachineVision.FindCoordTransformUsingTwoRects
specify two rectangular ROIs, each containing one separate,
straight boundary of the object, as shown in Figure 5-3. The
boundaries cannot be parallel. The regions must be large enough
to include the boundaries in all of the images you want to inspect.
5-4
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3
b.
1
4
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