IDEC DATAVS1 Series - Manual (Page 22)

Instruction Manual SVS1 Series
17
Width Control of the size of details
Edge
Counting Counting of details along an edge
Once the inspection tool has been selected, it is necessary to position and size the regions of interest
(ROI) to be monitored.
The meaning of the ROI varies according to the control tool selected. The chart below provides a
rough indication on the meanings. Please refer to Chapter 7 for further details.
Tool ROI description
Brightness This identifies the area within which the algorithm calculates the average
brightness value
Contrast This identifies the portion of the field range within which the algorithm
calculates the maximum contrast value
Position This identifies the area within which significant variations in brightness are
searched (edge
) and mainly distinguish the edges of details to be
inspected
Width As in the case of position control, this defines the area within which the
algorithm searches the edges on the detail of which it is necessary to
measure the width
Edge Counting This describes the area within which a search is made for edges ( )
which are then counted by the algorithm
Pattern Match This defines the pattern (detail) to be searched within the whole focus
range
OCV This describes the portion in which the device searches for the characters
to be monitored
To modify the position of the ROI, move to the Move ROI icon and then press SET.
NOTE:
The procedure used to reposition and resize the ROI indicated herein can be applied to all
inspection tools available on the sensor. The only exception is the Pattern Match which requires two
inspection areas to be set and therefore has a specific procedure. Please refer to Chapter 7.7 for
further details.
It is now possible to move the ROI using the ARROW buttons. The coordinates (expressed in pixels)
of the top left hand corner of the ROI are displayed at the bottom of the screen. Once you have
achieved the desired position, press the TEACH button to save the settings and return to the Setup
menu. Press the ESC button to return to the Setup menu without saving the modifications (the system
will request confirmation on the saving option).