Datalogic 959941000, Инструкция по эксплуатации

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Instruction Manual DataVS1 Series
67
7.9. Pattern Count

Description
The term pattern match indicates a process where sample image is recognised by
searching for the matching brightness matrix in the target image. (Pattern Match

)
Once ROI is fixed, the inspection looks for the target object within a specific area of the image
and determines its position and number of matching objects found. It is hence possible to detect
the horizontal traverse as well as the vertical shifting of the object within the inspection area.
NOTE:
the image used by the algorithm to make the comparison for the inspection can be
defined by user during the Setup stage, by pressing the
TEACH
button. If user moves on to the
Adjust stage without setting any reference image, the inspection algorithm will use as reference
the first frame captured after tool selection. If current selection is not suitable, a new reference
can easily be set by going back to Setup stage (pressing
ESC
).

Selection

Positioning
ROI position and resizing for Pattern Count inspection is different compared to the other
inspection tools. During setup user shall define both the sample to be looked for within the image
and the part of the area involved in the search.
Select this control by pressing
SET
button the relevant icon to create two rectangular ROIs: one
at the center of the focus range, representing the sample to be searched for, and the other, as
large as the whole image, which is the pattern search area.