Rockwell Automation 5370-CVIM2 Module - Manual (Page 297)

5 Chapter Chapter 7
Inspection Tools
7–59
In the CVIM2 system, some spatial filtering functions (such as Sobel) have
their kernel coefficients arrayed in specific pattern that, by convention,
achieves a specific filtering effect. Others spatial filter functions have
user–selectable coefficients.
NOTE: The user of convolution operations should have an understanding of
the basic concepts of 3x3 and 5x5 “neighborhood operation” processes. For
more information on this subject, here are some additional information
sources:
•
Computer Imaging Recipes in C, by H. R. Myler and A. R. Weeks, PTR
Prentice Hall, 1993, ISBN 0–13–189879–5.
•
The Image Processing Handbook, by J. C. Russ, CRC Press, 1992, ISBN
0–8493–4233–3.
•
Digital Image Processing: A Practical Primer, by G. A. Baxes, Cascade
Press, 1984, ISBN 0–945591–00–4.
Image Arithmetic –– Arithmetic operations can perform subtraction or
addition between images from two sources: a primary image source (
S1 ),
and one of three secondary image sources ( S2 , S1’ , or T). The S1 and S2
sources are either a camera (such as C1 ) or the output of an image processing
tool (such as P1 ). The “ S1’ ” image source is always the current image, while
the “T” image source is a “feature” image stored from the current image or
from an earlier one.
A typical application of image subtraction is to cancel identical features in
two images and emphasize different features. A typical application of image
addition is to combine features of two images into a single image for further
analysis.
When “ Image ” is picked in the toolset edit panel, the image tool edit panel
appears, as shown in Figure 7.50.
Figure 7.50 Example: Image Tool Edit Panel
Image Tool Edit Panel