9-40
Positional deviation measurement
9
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 1-
point edge).
- When a 2P-EDGE (2-point edge) has been specified.
[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
[Example of an edge detection point in detection mode, shown with different directions of
detection.]
- 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
· Point of change/ from light
to dark, horizontal
· Point of change/ from light
to dark, vertical
· Point of change/ from dark
to light, horizontal
· Point of change/ from dark
to light, vertical
A
Edge detection point
B
A
B
Edge detection point
A
Light
↑
Brightness
↓
Dark
Light
↑
Brightness
↓
Dark
Direction
B
Width of
edge
Width of
flat
A
Edge
detection
point
B
A
B
A
Difference
in light
Direction
Width of
edge
Width of
flat
Difference
in light
B
Detection direction
Detection direction
Detection
direction
Detection
direction
1
DETECT MODE (MDL0)
(detection mode)
3
DETECT AREA (MDL0)
(area of detection)
2
DETECT DIR. (MDL0)
(detection direction)
4
THRESHOLD (MODEL0)
(threshold values )
5
PRC. PROJECT (MDL0)
(artifact processing)
q
UPPER MENU
1
DETECT MODE (MDL0)
(detection mode)
3
DETECT AREA (MDL0)
(area of detection)
2
DETECT DIR. (MDL0)
(detection direction)
4
THRESHOLD (MODEL0)
(threshold values)
5
PRC. PROJECT (MDL0)
(artifact processing)
6
DETECT MODE (MDL1)
(detection mode)
7
DETECT DIR. (MDL1)
(detection direction)
8
DETECT AREA (MDL1)
(area of detection)
9
THRESHOLD (MODEL1)
(threshold values)
0
PRC. PROJECT (MDL1)
(artifact processing)
q
UPPER MENU
Line type
Dotted line
Movement
Units of 1 pixel
Size
Units of 1 pixel
Minimum
0 x 0 pixels
Maximum
512 x 480 pixels