Rockwell Automation 5370-CVIM2 Module - Manual (Page 311)

5 Chapter Chapter 7
Inspection Tools
7–73
Figure 7.61 Example: Effect of Average 3x3 Kernel on Inspected Object
Image
tool
Inspected
object
Average 5x5 Kernel –– The coefficients values in the Average 5x5 kernel
are all equal to 1, as follows:
1 1 1 1 1
1 1 1 1
1 1 1 1 1
1 1 1 1 1
1 1 1 1 1
1
The operation of the Average 5x5 kernel is the same as the operation of the
Average 3x3 kernel illustrated in Figure 7.60 (page 7–72). The difference is
that the Average 5x5 kernel multiplies each of the 25 gray scale values by
1/25.
Figure 7.62 (page 7–74) illustrates the effect of the Average 5x5 kernel on
the grid shown in Figure 7.61. Notice that the grid lines within the image tool
are somewhat more blurred when compared to the grid in Figure 7.61. This
demonstrates that the
Average 5x5 kernel has a somewhat greater
“smoothing” effect than the Average 3x3 kernel.