Panasonic PV500 User Manual page 114

4.
Press the FUNC key and select a scan direction "Clockwise" or
"Counterclockwise".
Default is "Clockwise".
5.
Tilt the ENTER key left/right to specify a start point and an end
point.
Tilting it right moves the start/end point clockwise and tilting left moves
counterclockwise.
The coordinates of the start point and end point are displayed in the
lower left on the screen. Use them to make setting.
6.
After setting the end point, press the CANCEL key.
Using Area Size Adjustment
Area Size Adjustment is a function for inspecting variable-sized objects. The function adjusts an inspection
area according to the size of the object detected with Area Size Adjustment checker.
Refer to Chapter 4.9, page 208 about Area Size Adjustment and the setting procedure.
Selecting Detect Condition of Edge
Set detailed conditions such as detecting direction of edge.
1.
Select "Inspection Condition".
Set Scan Direction, Scan Method, Edge Condition, Edge Threshold and Detected Position.
2.
Select "Search Method".
Set Scan Pitch, Filter, Width and Average Range.
About Conditions
Scan direction (Horizontal/Vertical) -- Only for Plane scan
Horizontal: Scans horizontally* from the start to the end points.
Vertical: Scans vertically* from the start to the end points.
*If you set a rotated area, it scans at the rotated angle.
Scan direction = Horizontal
Scan Method: Projection / Single
Set this when using projection scan. Projection scan calculates average brightness in the vertical direction
against the scan direction per column (or row) and detects the edges based on the composite image.
Original Image
112
Image after projection scanning
(Scan direction = horizontal)