IDEC DATAVS1 Series - Manual (Page 63)

Instruction Manual SVS1 Series
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• Parameters
Expected
Threshold used to assess the result. This indicates to what extent the detected area in the ROI
must match the sample image in order to be considered as valid (100% perfect match, 0% ... ).
• Sensitivity
This identifies the accuracy with which the pattern is searched inside the acquired image. The
higher the desired quality, the more time is required to complete the processing. Vice-versa, the
faster the processing must be, the lower the match quality will be.
• Result
If the number of detected patterns is between the minimum and maximum values set by the user,
the control gives a positive result. On the contrary, the result will be negative.
• Example:
Let's add a "pattern match" control to the current inspection tool, so we can check that there is a
logo on each box.
Let's select "Pattern Match" from the Controls menu and then press the SET button.
A rectangular default ROI will appear in the centre of the image
The ROI must be resized and positioned as required: follow the instructions provided earlier
during this procedure.