Rockwell Automation 5370-CVIM2 Module - Manual (Page 178)

5 Chapter Chapter 6
Reference Tools
6–19
Max B. Object –– The maximum background object feature mode enables
you to specify a reference point on a reference line axis from the following
points on the axis:
•
The leading edge of the maximum–size object along the axis.
•
The midpoint between the leading edge and the trailing edge of the
maximum–size object.
Figure 6.17 uses both the binary gaging mode and the gray scale gaging
mode to identify the potential maximum background object reference points.
Figure 6.17 Example: Maximum Background Objects (Binary and Gray Scale)
Adjacent
pixels
Adjacent
pixels
Midpoint
Leading
edge
Maximum background object
Midpoint
Leading
edge
A
B
Binary gaging mode:
Gray scale gaging mode:
Maximum background object
Note in Figure 6.17 that the term “background object” has a different
meaning for binary and gray scale gaging modes, as follows:
Binary gaging mode –– The maximum background object is the one with the
greatest number of consecutive black pixels between the first and last
detected edges on the axis. In example (A), above, the leftmost object has the
greatest number of consecutive black pixels.