Panasonic PV500 User Manual page 158

Setting Edge Conditions
Specify the condition of detecting edges and scanning.
1.
Select "Inspection Condition".
2.
Set "Detect Direction".
Set a Detect Direction which is suitable for the captured image. For the image shown below, setting
"Outside -> Inside" detects edges correctly.
• Inside ->
Outside
• Top -> Bottom
(Checker
Direction
= Horizontal)
For the information of the following conditions, refer to the chapter of Gray Edge checker (page 110).
·
Inspection Condition - "Scan Method", "Edge Condition", "Detected Position"
·
Search Method
Deciding Differential Threshold
Decide a threshold value of differential in detecting area. Only the areas with differential value which is higher
than this threshold are subjected to detect.
The threshold can be set in two ways, common setting and individual setting. The common setting sets the
same value for all Gray Edge cells and the individual setting sets separate values. Use the individual setting if
pins have different brightness or only some of pins are dark due to lighting condition.
1.
Select "Thresh.Adj.".
2.
Press the TRIG key to execute a test.
The detected edge differentials are displayed. Use them to set the threshold.
3.
To set threshold of Gray Edge cells individually, select "Yes" for "Set Individually".
Select "No" not to employ individual Setting.
4.
Select the threshold setting table.
5.
To employ the common setting, select the
row of "Common" and enter a value.
To use the individual setting, select Gray Edge
cell number and enter a threshold.
"Thre.1" and "Diff.1" are respectively threshold
and differential value of Area 1 which detects the
base of a float.
156
• Outside -> •
Inside
• Bottom -> Top
(Checker
Direction
= Horizontal)
Right -> Left •
(Checker Direction
= Vertical)
Left -> right
(Checker Direction
= Vertical)