Choosing A Method To Build The Coordinate Transformation - National Instruments IMAQTM User Manual

Choosing a Method to Build the Coordinate Transformation

Start
Object positioning
accuracy better
than ±65 degrees.
Yes
The object under
inspection has a straight,
distinct edge (main axis).
Yes
The object contains a
second distinct edge not parallel
to the main axis in the same
search area.
Yes
Build a
coordinate transformation
based on edge detection
using a single search area.
End
© National Instruments Corporation
Figure 5-4 guides you through choosing the best method for building a
coordinate transformation for the application.
No
No
No
The object contains
a second distinct edge not
parallel to the main axis in a
separate search area.
Yes
Build a coordinate
transformation based on
edge detection using two
distinct search areas.
Figure 5-4. Building a Coordinate Transformation
Chapter 5
No
Object positioning
accuracy better
than ±5 degrees.
Yes
Build a coordinate
transformation based on
pattern matching
shift invariant strategy.
5-7 IMAQ Vision for Visual Basic User Manual
Performing Machine Vision Tasks
No
Build a coordinate
transformation based on
pattern matching
rotation invariant strategy.