Table of Contents
Advertisement
Positional deviation measurement
Continued from the previous page
[Procedure for setting the conditions for edge detection]
- When you specify a 1P-EDGE (1-point edge) or a 1P-SCH + 1P-EDGE (1-point search + 1-
point edge).
1DETECT MODE (MDL0)
(detection mode)
4THRESHOLD (MODEL0)
(threshold values )
- When a 2P-EDGE (2-point edge) has been specified.
1DETECT MODE (MDL0)
(detection mode)
4THRESHOLD (MODEL0)
(threshold values)
6DETECT MODE (MDL1)
(detection mode)
[Information about the settings for edge detection]
In order to record a reference image it is necessary to freeze the frame.
- Specifications for the area of detection
Line type
Dotted line
[Example of an edge detection point in detection mode, shown with different directions of
detection.]
9
· Point of change/ from light
to dark, horizontal
Edge detection point
· Point of change/ from dark
to light, horizontal
Detection direction
- The edge detection point is used as a reference coordinates when the positional deviation is
detected.
- Compared with a gray scale search, the edge detection is quicker but the position detection is
less accurate.
Return to the [MEASURING COND] (measurement conditions) menu and select item 5 UPPER MENU.
Continued on the following page
2DETECT DIR. (MDL0)
(detection direction)
5PRC. PROJECT (MDL0)
(artifact processing)
2DETECT DIR. (MDL0)
(detection direction)
5PRC. PROJECT (MDL0)
(artifact processing)
7DETECT DIR. (MDL1)
(detection direction)
9THRESHOLD (MODEL1)
(threshold values)
Movement
Units of 1 pixel
Units of 1 pixel
· Point of change/ from light
to dark, vertical
A
B
Detection direction
· Point of change/ from dark
to light, vertical
A
B
Edge
detection
point
3DETECT AREA (MDL0)
(area of detection)
qUPPER MENU
3DETECT AREA (MDL0)
(area of detection)
8DETECT AREA (MDL1)
(area of detection)
0PRC. PROJECT (MDL1)
(artifact processing)
Size
Minimum
0 x 0 pixels
Edge detection point
Light
A
Brightness
Dark
B
A
Light
Brightness
B
Dark
9-40
qUPPER MENU
Maximum
512 x 480 pixels
Width of
Width of
edge
flat
Difference
in light
A
Direction
B
Width of
Width of
edge
flat
Difference
in light
Direction
A
B
Advertisement
Table of Contents
