IDEC DATAVS2 Series - Manual (Page 54)

SVS2 Series Instruction Manual
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8.5.4. Edge Count
Description
This control identifies all edges (edge detection ►) located inside the ROI.
Based on the first derivative of the pixel brightness variation function, the maximum positive peak is
identified if control is targeting a positive edge, or the maximum negative peak is identified when
targeting a negative edge. A point is considered an edge point when its brightness variation exceeds
this threshold, which is a function of the peak value found;
Selection
Pointer shape
Positioning
Click any point inside the work area to create a rectangular ROI with a small white square at the
bottom right corner.
To change ROI size, left-click and drag the square.
To move the ROI, place the pointer on any side of the ROI. The pointer changes to a cross. Press and
hold the left mouse button and drag the rectangle to the desired position.
Parameters
After clicking in the work area to create the ROI, the control panel displays the set of parameters that
enable control customisation.