Image processing apparatus for determining rates of OCR for every colors by functions of respective color signals
US5255084A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 5, 1991 |
| Grant date | Oct 19, 1993 |
| Priority date | — |
| Expiry date | Sep 5, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/6025
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Disclosed herein is an image processing apparatus for determining the rate of UCR (under color removal) for each color by a function of each of color signals. The image processing apparatus basically comprises a device for determining the maximum value Max and the minimum value Min of each of input signals Yi, Mi and Ci, and a device for determining the rates of UCR indicative of Y.sub.U, M.sub.U and C.sub.U from the input signals Yi, Mi, Ci and the maximum value Max and the minimum value Min, using respective functions F.sub.Y, F.sub.M and F.sub.C. The above-described Y.sub.U, M.sub.U and C.sub.U can be determined in accordance with the following equations: EQU Y.sub.U =F.sub.Y (Max, Min, Yi) EQU M.sub.U =F.sub.M (Max, Min, Mi) EQU C.sub.U =F.sub.C (Max, Min, Ci).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.