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Continued from the preceding page
(12) Degree of match inspection
Press the TRG/BRT key, and the inspection result for image 0 (registration No. 00) will be displayed.
(TYPE00)
OK
MEAS. XXXXXXms
MEAS1 CAM1 DEG OF MATCH
REGST NO. 00(0~15)
MATCH (MDL 0)
+ 09735 OK
X COORD. (MDL 0) X=090.0 OK
Y COORD. (MDL 0) Y=092.0 OK
LIGT LVL (MDL 0)
X0~6
Y0~7
:
MSR-CHNG REG-CHNG PC-MONTR SET-SCRN MANL-TYP-CHG
*1
*1
Move the cursor to "REG-CHNG" (registration change) with the left and right keys, and press
the up or down key. The result of evaluating image 1 (registration No. 01) will be displayed.
*2
The final evaluation result will be displayed as "OK" in the upper left corner of the screen when
all of the items have been evaluated as acceptable. If there is a single unacceptable item,
"NG" will be displayed.
*3
"MATCH:+09735" means that the degree of match (percentage of pixels that match) between
an object image and the reference image is 97.35%.
[The acceptance and rejection criteria based on the degree of match]
In order to evaluate acceptability based on the degree of match, first an image of a good
specimen is stored for reference. Then, an image of defective specimen is compared for
degree of match. Finally an image of another good specimen is compared. These
comparisons establish the degree of match to be used for setting the limits used for working
comparisons.
For example, the degree of match for a non-defective object is 90% or more and that for a
defective object is 70% or less, then the threshold value for degree of match can be set to
approx. 85%. This allows the evaluation acceptability to be made.
*4
When the final evaluation result is OK, Y0 is turned ON, and a filled box is displayed. (When
the result is NG, an empty box is displayed.)
When the auxiliary relay C112 is turned ON, Y0 is turned ON according to the condition set in
step (10) for final evaluation output.
F L C1ALLC2NO
018.4 OK
BUSY
:
:
*4
3-21
Operation Examples (Degree of match inspection)
[Display of inspection result]
VX.X
Final evaluation result (*2)
Measuring time
Registration No.
Degree of match to reference image (*3)
X-Y coordinates (pixels) of
detection point
Average light level in image window
3
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