Process and apparatus for the colorimetric measurement of a two-dimensional original
US6765674B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 10, 2001 |
| Grant date | Jul 20, 2004 |
| Priority date | — |
| Expiry date | Aug 10, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/6047
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
For the colorimetric measurement of a two-dimensional original, the original is photoelectrically scanned pixel by pixel in a first step by way of a color-enabled photoelectric scanning device. A digital color representation of the original is produced from the thereby obtained scanning data. In a second step, suitable measuring positions are determined from the digital color representation of the original by way of a computer using image processing methods. In a third step, the color measuring head is automatically moved under the control of the computer to the so determined measuring positions and the original is colorimetrically measured at those measuring positions. The color data obtained thereby can be further processed, for example for the generation of apparatus profiles for the colorimetric control of output apparatus. The scanning device is preferably a high resolution flatbed or autofeed scanner or a digital camera. The color measuring head is preferably a spectral measuring head. By the comparatively high resolution pixel by pixel scanning of the original, the measuring positions can be very exactly determined without manual input and without time consuming multiple mea…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.