5-3
Degree of Match Inspection
5
Setting the measurement conditions
DTECT PRECISON
Select detection precision. You can select
one of two levels (standard/high), according
to your conditions, the desired precision level
for detection results, and the detection speed.
For details, see page 3-20.
REGISTER NO.
16 registers are available for the degree of
match inspection (Registers 0 to 15).
If you want to set the measurement
conditions for a different register number,
press the SET key to highlight the register
number currently selected. Then press the up
and down arrow keys to select the register
number whose measurement conditions you
want to set. Press the SET key to confirm
your selection.
MODE
Select a detection mode.
Detail of each mode are as follows.
Gray search
See page 3-20.
SEARCH
Specify whether or not to use the search function.
MATCHING
Select a density for comparison when inspecting the image. The details are as follows.
REGISTER NO. (
MDL 0,
MDL 1)
The specified modes are displayed for each register number on these lines. When a 1-point
search is specified, only "
MDL 0" will be available. When a 2-point search is specified,
"
MDL 1" is also available. The "S" in the table indicates a gray search. "X" means not used.
An example of mode selection
REGISTER NO.
STANDARD
HIGH
NO
1P-SCH
2P-SCH
RED F C1 BRT
MEAS CND
SCREEN
COND
SAVE
SET=SELECT A MENU FOR ESC=BACK SEL=CHNG IMG TRG=FUNC
1
DTECT PRECISION STANDARD
2
REGISTER NO.
00(0
〜
15)
3
MODE
2P-SCH
4
SEARCH
YES
5
MATCHING
AVG-GRAYS
6
MDL 0
7
MDL 1
YES
NO
AVG-GRAYS
DIFF.ABS
15
14
13
12
11
10
09
08
07
06
05
04
03
02
01
00
×
S
× × × × × × × × × × × × × ×
×
S
× × × × × × × × × × × × × ×
Description
Obtain average light level of the image in the area detected using the gray search.
Calculate the difference of the absolute values from the image detected using the
gray search and the reference image. The result is light level difference. By
obtaining this value, you can get an idea of the total change in light level.
Total light level difference =
S
(Ni — Nt)
Ni : Light level of the captured image (contraction 3)
Nt : Light level of the reference image (contraction 3)
Average
light level
Difference
absolute
value
00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15
S S × × × × × × × × × × × × × ×
× S × × × × × × × × × × × × × ×
REGISTER NO.
6
MDL0
7
MDL1
S
:
Gray search
×
:
No setting
REGISTER00 : 1P-SCH
REGISTER01 : 2P-SCH
MODE
Details
NO (None)
Does not detect.
1P-SCH
(1-point search)
Detect the positional deviation of one point in the scanned image
compared to a single reference image, after performing a gray search.
2P-SCH
(2-point search)
Detect the positional deviation of two points in the scanned image
compared to two reference images, after performing a gray search.