Omron V-TS Teaching Manual.pdf.pdf - 第303页
Appendix 7. Positio n Correction/Extractio n a- 26 Inspection im age W indow setting Component extract ion model For stable component extra ction, the character istic param eters need to be conf igured so that the rate o…
Appendix 7. Position Correction/Extraction
a-25
4) Set the parameters if not set.
Details of the procedure to adjust component extraction using characteristic parameters are as follows:
The component extraction function extracts something similar to the component by template (model)
matching. The component extraction model is created based on the window setting like the figure below.
Inspection image
Window setting
Component extraction model
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.