Electronic color imaging system and analog signal processor therefor
US5235412A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 17, 1992 |
| Grant date | Aug 10, 1993 |
| Priority date | — |
| Expiry date | Aug 17, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N25/133
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
There is disclosed an electronic imaging system employing a high efficiency CCD imaging unit and a plurality of unique analog signal processors (ASP's). The ASP's operate in unison for receiving a first color sequence, such as cyan (C), yellow (Y), and green (G), of color-component pixel image signals from the CCD unit and for providing respective output image signals of a second sequence of color components such as blue (B), red (R), and green (G), having proper white balance for combining into a high definition full color image. The dark background or zero level of the output image signals is referenced to a common "dark" reference voltage to minimize dark background variations in the combined color image. Each ASP is substantially identical and has a unique architecture which facilitates its implementation as an integrated circuit. The ASP has a dynamic range of substantially better than 8-bits and provides for a wide range of signal sample rates (e.g., 1 to 40 MHz). By employing masks of certain colors such as C, Y and G in the CCD unit itself higher efficiency and lower noise is obtained than by using colors such as R, G, and B.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.