Apparatus and method for color calibration
US5339176A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 4, 1991 |
| Grant date | Aug 16, 1994 |
| Priority date | — |
| Expiry date | Feb 4, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/6033
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
There is disclosed technique and apparatus for calibrating a color processing device. The technique includes the steps of comparing a first digital representation of a colored image with a second digital representation thereof and employing at least the transformation to control operation of the color processing device to be calibrated. The first digital representation defines a plurality of first non-scalar color values and the second digital representation defines a plurality of second non-scalar color values corresponding to the plurality of the first non-scalar color values, thereby to provide a transformation pairing each individual one of the first non-scalar color values with a value relatively close to the corresponding one of the second non-scalar color values. The color processing device may be calibrated generally without reference to human aesthetic judgement. There is additionally provided a method and apparatus For transforming an element off a domain of a first color printing device to an element of a domain of a second color printing device. The method comprises the steps of providing a first transformation from a first digital representation of a colored image to a…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.