Rockwell Automation 5370-CBPK Color CVIM BLISTER-PAK Option - Manual (Page 47)

Chapter 6
Adjusting Blister Windows
6–5
NOTE: The system may not detect foreign material that is touching a tablet
if the area of the corresponding “hole” in the background is not sufficiently
larger than the tablet area.
When you pick the Define Background menu item the Define Background
menu appears, as shown in Figure 6.5. Using this menu, you can enable (or
disable) the background function and define or “fine tune” the qualities of the
application background.
Figure 6.5
Selecting Define Background Menu
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Background
Use the Background menu item to enable or disable the background
inspection function. When you pick this menu item, it toggles to the alternate
state. Thus, if it currently displays
Background: Disabled , it toggles to
Background: Enabled (and vice versa), as shown in Figure 6.5.
Filter
Use the Filter menu item to display the Pixel/Obj Filter menu, which enables
you to control the binary morphology settings applied to the image during
background processing. Refer to the discussion of general image filtering on
page 6–13 in this manual, and to Chapter 18 of the Color CVIM User’s
Reference Manual, Cat. No. 5370–ND009, for information on using filters.
Minimum Background Area
Use the Min BG Area menu item to select the minimum area of a region in
which the background color is absent. The system will ignore any
background contour having a smaller area; thus, you can use this setting to
detect foreign objects in the background, while ignoring small lighting
anomalies that affect the background color. The default value is 25 pixels.
When you pick this menu item, a Min BG Area slide bar appears. Use the
cursor to select any area value between 1 and 1000 pixels. When you move