National Instruments IMAQTM - Manual (Page 66)

Chapter 5 Performing Machine Vision Tasks
IMAQ Vision for Visual Basic User Manual 5-14 ni.com
Feature Detail
A template with relatively coarse features is less sensitive to variations in
size and rotation than a model with fine features. However, the model must
contain enough detail to identify it.
Figure 5-8. Feature Detail
Positional Information
A template with strong edges in both the x and y directions is easier to
locate.
Figure 5-9. Positional Information
a Good Feature Detail b Ambiguous Feature Detail
a Good Positional Information in x and y
b Insufficient Positional Information in y
a. b.
a. b.