2-16-(9)
EC Positioning
Section 2-16
The Measurement Conditions Settings Screen will be displayed.
5.
Make the settings for each item.
6.
Select End.
The settings will be registered and the screen in (3.) will return.
STEP 2: Setting the Search Region
Set the region to search for the positioning mark.
Adjust the search region if there are areas not to be included in circle
searches.
CHECK
When edges are extracted, the pixels at the edges of the screen cannot be
processed accurately. Do not include the outer edges of the screen when set-
ting the search region.
Each time the image is filtered, the range of inaccurate pixels will be increased
further. For example, if filtering is performed twice, the valid range will be
reduced as follows:
Filter size of
5
5: -2 pixels
3 = -6 pixels
Filter size of
3
3: -1 pixel
3 = -3 pixels
(Filtering is also performed once in edge extraction, so filtering is actually per-
formed a total of three times.)
CHECK
The search can be performed even if the whole circle is not within the search
region, as long as the center of the circle is within the region.
End
Measurement conditions
Circle color
Skipping
Circular value
:
:
:
Black
ON
[ 0]%
Screen size
Valid range:
(0,0) to (511,483)
Filter size of 3
3
484
pixels
512 pixels
-1 pixel
Filter size of 5
5
Valid range:
(1,1) to (510,482)
Valid range:
(2,2) to (509,481)
-2 pixels
Search region
Circle center
Search region
