Rockwell-automation 5370-CVIM2 Module User Manual download pdf (Page 322)

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101

Chapter 7

Inspection Tools

7–84

In an image addition operation, the image tool adds an AOI in the secondary

image designated by S2 or S1’ (or a “template” designated as T) to an AOI

in the primary image designated by S1, and places the resulting unsigned

image in the designated destination buffer. More specifically, the value of

each pixel in the S2, S1’, or T image is added to the value of each

corresponding pixel in the S1 image, and the sum is divided by two. The

resulting average of the two values is then placed the destination buffer.

If S1 and S2 (or SȀ or T) are binary images, a logic AND function will be

performed on the two images, as shown by the following table:

S2, SȀ, or T

Pn or Bn

Black Black Black

Black White Black

White Black Black

White White White

The basic configuration details that apply to the image subtraction operations

apply also the image addition operations. Refer to the corresponding section

under the Image Subtraction heading, immediately preceding this section, for

details.

As you configure an image tool, under some circumstances you will see two

related warning messages on the display. These messages (which appear

sequentially) are intended to alert you to certain adjustments that the CVIM2

system makes automatically during the image tool configuration.

The two messages are these:

• The tool is outside of the image.

• The tool was modified to fit.

This section explains these two messages and the circumstances under which

they occur.

Whenever you add a new image tool to the toolset edit panel, by default it

will enter the lowest numbered camera (such as “C1”) in the “S1” source

column. If you then change S1 source to an image buffer (such as “P1”)

containing an image from an earlier image processing tool, that image will

typically be significantly smaller than a full–size camera image and will

always be positioned, by default, in the upper–left “corner” of the image

buffer.

Image Tool Operations:

Warning Messages

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Rockwell-automation 5370-CVIM2 Module User Manual Page 322

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