National Instruments IMAQTM User Manual
Chapter 5
Performing Machine Vision Tasks
5-32
ni.com
•
DrawRectangle
—Overlays a CWIMAQRectangle object on an
image.
•
DrawOval
—Overlays a CWIMAQOval object on an image.
•
DrawArc
—Overlays a CWIMAQArc object on an image.
•
DrawPicture
—Overlays a picture object onto the image.
•
DrawText
—Overlays text on an image.
•
DrawRegions
—Overlays an ROI described by the CWIMAQRegions
object on an image.
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
CWIMAQOverlay.DefaultColor
property
is used.
You can configure the following CWMachineVision methods to overlay
different types of information about the inspection image:
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
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
that allows you to select the information you want to overlay. Set the
boolean property that corresponds to the information you want to overlay