Chapter 5
Machine Vision
©
National Instruments Corporation
5-29
IMAQ Vision for LabWindows/CVI User Manual
You can configure the following processing functions to overlay different
types of information on the inspection image:
•
imaqFindEdge()
•
imaqFindCircularEdge()
•
imaqFindConcentricEdge()
•
imaqClampMax()
•
imaqClampMin()
•
imaqFindPattern()
•
imaqCountObjects()
•
imaqFindTransformRect()
•
imaqFindTransformRects()
•
imaqFindTransformPattern()
You can overlay the following information with all the above functions
except
imaqFindPattern()
:
•
The search area input into the function.
•
The search lines used for edge detection.
•
The edges detected along the search lines
•
The result of the function.
With
imaqFindPattern()
, you can overlay the search area and the result.
Select the information you want to overlay by setting the element that
corresponds to the information type to TRUE in the
options
input
parameter.
Use
imaqClearOverlay()
to clear any previous overlay information
from the image. Use
imaqWriteVisionFile()
to save an image with
its overlay information to a file. You can read the information from the
file into an image using
imaqReadVisionFile()
. As with calibration
information, overlay information is removed from an image when the
image size or orientation changes.
