IDEC DATAVS2 Series - Manual (Page 62)

SVS2 Series Instruction Manual
57
Example
Add a "Pattern Match" control to current inspection.
Select "Pattern Match" from the pull-down menu:
Position the control on the reference image in the work area: the pointer changes shape as soon as it
enters the work area. Left-click once at any position to create two default rectangular ROIs. At the
same time, the control features and the result of its application to the reference image appear in the
control panel.
Set size and position of ROIs as required, as explained above.
The result indicated by STATUS is also highlighted by
the ROI border changing colour.
The value of parameter "Calculated", which indicates
the degree of similarity in percent, is reported inside
the areas inside the search ROI found to be similar to
the master image of the reference ROI.
As soon as values change, result is calculated without
delay.
Another two possible example of application of the
Pattern Match Control Tool are presented.
In the first one, the tool is used to control the
orientation of a shampoo bottle. In particular, we want
to check that the bottle plug is on the front of the
camera. In Fig. A is shown a successful check, on the contrary the Fig. B shows a failure. In Fig. A,
please note the presence of the two different region, the search region (the bigger one) and the
matching one (the smaller one).
In the second example the investigation intent is to verify the presence of the postage stamp on the
envelope. As shown in Fig. C, the reference pattern is set to entirely cover the postage stamp
graphics, whereas the search region is wider and completely contains the pattern region. The Fig. D
shows an unsuccessful check.
Fig. A: SUCCESS Fig. B: FAILURE
Fig. C: SUCCESS Fig. D: FAILURE