Rockwell Automation 5370-CVIM2 Module - Manual (Page 320)

Chapter 7
Inspection Tools
7–82
Either of the AOI’s can be resized and/or positioned first –– the order is not
important.
In general, the size and position of each AOI is determined as follows:
•
Each AOI will assume the size (height and width) of whichever AOI was
resized last. Thus, AOI#1 will take the size of AOI#2, if AOI#2 was
resized last; and vice versa.
•
The position of the upper–left corner of one AOI will not be changed by
the resizing/repositioning of the other AOI.
NOTE: The reference line tool ( Tool 1 ) in Figure 7.65 is configured to
supply shift and rotation compensation to the two image tools ( Tool 2 and
Tool 3 ). When the workpiece rotates during inspection operations, the output
from Tool 1 causes Tool 2 and Tool 3 to rotate. The effect on Tool 3 is to
rotate its S1 image source ( C1 , camera #1), but not its S2 image source ( P1 ,
from Tool 2 ). In this example, however, since Tool 2 is rotated from Tool 1 ,
Tool 3 ’s S2 image source will also be rotated.
S1 – S1’
The S1 – S1’ image arithmetic operation subtracts one AOI within the S1
image from another AOI within the same S1 image.
S1 and S1’ both represent the image source that is supplied to the current
image tool and designated in the “ S1 ” column. The image source can be
either a camera ( C1 , C2 , and so on) or an image buffer ( P1 , P2 , or P3 )
containing an image processed by another image tool or a rotation finder
tool. (Any source that may appear in the “
S2 ” column will have no effect on
the S1 – S1’ subtraction operation.)
When the S1 – S1’ subtraction operation is selected, the and
buttons are both active. The button relates to image
source S1 , while the button relates to image source S1’ .
Initially, the AOI #1 window is superimposed over the AOI #2 window in the
upper–left part of the screen. The AOI #1 window should always be
positioned first, using the
button to select its pick and place
function.
After the AOI #1 window is positioned, and the pick and place function
exited, the AOI #2 window can be positioned over the appropriate part of the
image, using the
button to select the corresponding pick and place
function. Note that the AOI#2 window always adopts the size of the AOI#1
window –– its size cannot be altered independently.
The image in the AOI #2 window ( S1’ ) is subtracted from the image in the
AOI #1 window ( S1 ), and the result always appears in the AOI #1 window
when neither window is being “picked and placed” and when the result of