Omron V-TS Teaching Manual.pdf.pdf - 第304页

Appendix 7. Positio n Correction/Extractio n a- 27 The component extr action succeeds if the following five cond itions are satisfied. (1) Th e component is binarized with the com ponent color . (2) The electrode is b in…

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Appendix 7. Position Correction/Extraction
a-26
Inspection image
Window setting
Component extraction model
For stable component extraction, the characteristic parameters need to be configured so that the rate of
matching between the component extraction model and binarized inspection image becomes higher. To
close to the 100% matching rate, the component and electrode need to be binarized with each
characteristic parameter.
Matched image
Unmatched image
Electrode is binarized with
the component color
Matching rate
drops on
electrode area.
Component
extraction model
Component is binarized with
the electrode color
Matching rate
drops on
component
area.
Good binarization
Matching rate
does not drop.
Appendix 7. Position Correction/Extraction
a-27
The component extraction succeeds if the following five conditions are satisfied.
(1) The component is binarized with the component color.
(2) The electrode is binarized with the electrode color.
(3) The PCB and silk close to the component are not binarized.
(4) The solder close to the electrode is not binarized with the component and electrode colors.
(5) The component is not binarized with the electrode color.
Example 1. Chip capacitor
Inspection image
Component extraction model
Acceptable
All the conditions from (1) to (5) are satisfied and therefore component extraction succeeds.
Unacceptable
Component extraction fails
because condition (5) is not
satisfied.
Component extraction fails
because conditions (4) and (5)
are not satisfied.
Component extraction fails
because conditions (1) and (4)
are not satisfied.
Appendix 7. Position Correction/Extraction
a-28
Example 2. Transistor
Inspection image
Component extraction
model
Acceptable
All the conditions from (1) to (5) are satisfied and therefore
component extraction succeeds.
Unacceptable
Component extraction
fails because
conditions (3) and (4)
are not satisfied.
Component extraction
fails because condition
(3) is not satisfied.
Component extraction
fails because
conditions (1) and (3)
are not satisfied