Geometry-controlled colour discrimination of reflective metal bottle caps
Closely spaced colours on reflective metal caps are affected by surface reflections and changing bottle height. This concept maintains repeatable measurement geometry in a colour region separated from any print.
The selected colour class, proximity to its reference and validity status reach the quality interface. Sample trials test close colour pairs, cap printing and distance variation; no numerical discrimination guarantee is claimed.
- 01 Presentation
- 02 Trigger and reference
- 03 Image / profile
- 04 Decision
- 05 Evidence and PLC
Load reference colour recipe
- Sample record
- —
- Reference colour class
- —
- Acquisition progress
- —
Scenes are illustrative simulations; they are not customer references or performance guarantees.
Solution approach
The cap enters a fixed viewing geometry. Controlled illumination and glare management support a colour sensor or colour-camera signal. Actual caps establish reference classes; samples without valid position and signal are not forced into a colour class.
Process steps
- 01
Presentation
Load reference colour recipe
- 02
Trigger and reference
Verify cap position
- 03
Image / profile
Acquire controlled colour signal
- 04
Decision
Compare reference classes
- 05
Evidence and PLC
Transmit class and validity
Related applications
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