Electronic color imaging system and analog signal processor ther

Details Electronic color imaging system and analog signal processor ther Electronic color imaging system and analog signal processor ther

1992-08-17

1993-08-10

Powell, Mark R.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 41, 358171, H04N 967, H04N 552

Patent

active

052354121

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.

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M. H. White et al., entitled "Characterization of Surface Channel CCD Image Arrays at Low Light Levels", IEEE Journal of Solid-State Circuits, vol. SC-9, No. 1, Feb. 1974, pp. 1-13.

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