National Instruments IMAQTM User Manual page 84

Chapter 5 Performing Machine Vision Tasks
Tip You can select the color of overlays by using one of these methods. If you do not
supply a color to an overlay method, the
is used.
IMAQ Vision for Visual Basic User Manual
•
DrawRectangle
image.
• —Overlays a CWIMAQOval object on an image.
DrawOval
• —Overlays a CWIMAQArc object on an image.
DrawArc
• —Overlays a picture object onto the image.
DrawPicture
• —Overlays text on an image.
DrawText
• —Overlays an ROI described by the CWIMAQRegions
DrawRegions
object on an image.
You can configure the following CWMachineVision methods to overlay
different types of information about the inspection image:
•
FindStraightEdge
•
FindCircularEdge
•
FindConcentricEdge
•
MeasureMaximumDistance
•
MeasureMinimumDistance
•
FindPattern
•
CountAndMeasureObjects
•
FindCoordTransformUsingRect
•
FindCoordTransformUsingTwoRects
•
FindCoordTransformUsingPattern
You can overlay the following information with all the above methods
except
CWMachineVision.FindPattern
• The search area input into the method
• The search lines used for edge detection
• The edges detected along the search lines
• The result of the method
Each of the above CWMachineVision methods has a settings object input
that allows you to select the information you want to overlay. Set the
boolean property that corresponds to the information you want to overlay
—Overlays a CWIMAQRectangle object on an
CWIMAQOverlay.DefaultColor
5-32
property
:
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