Apparatus adapted to sense a colorant and method for sensing color and detecting a donor mispick condition
US6509919B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 1, 2000 |
| Grant date | Jan 21, 2003 |
| Priority date | — |
| Expiry date | Sep 1, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01J2003/466
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus for donor colorant detection and donor pick sensing employs N light sources of distinct wavelengths paired with N photosensors. Measured light values for a donor are combined to form an N-dimensioned coordinate value which is then compared against N-dimensioned reference values to determine a color or donor picking condition. The decision algorithm uses a decision rule based on Maximum Likelihood Decoding methods, whereby an Euclidean distance is computed between the measured N-dimensioned coordinate value and each of a set of reference N-dimensioned coordinate values. The apparatus and method detect which donor color has been picked and also detects and identifies multi-pick and pick failure conditions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.