Color pattern evaluation system for randomly oriented articles
US5911003A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 26, 1996 |
| Grant date | Jun 8, 1999 |
| Priority date | — |
| Expiry date | Apr 26, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/30164
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An imaging device coupled to a processor generates a number of image signals corresponding to a multicolor pattern of an item in motion. Each of a number of regions of the pattern is correlated to one of a number of reference colors to generate a segmented image of the pattern. The processor models the multicolor pattern by deriving a number of test values from the segmented image representation. Each test value is representative of a corresponding one of the regions and is determined as a function of region size independent of orientation of the multicolor pattern. The test values are compared to reference data to detect a variation of the item. The reference colors may be determined from color pairs with each pair having a first member from a first set of sample colors and a second member from a second set of sample colors. The first member is closer to the second member than any other color of the second set in the color space, and the second member is closer to the first member than any other color of the first set in the color space. An image of the item randomly oriented with respect to a model image is characterized by generating a number of characteristic values within the …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.