1 January 1992 High-performance digital color video camera
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J. of Electronic Imaging, 1(1), (1992). doi:10.1117/12.55183
Abstract
Typical one-chip color cameras use analog video processing circuits. An improved digital camera architecture has been developed using a dual-slope A/D conversion technique and two full-custom CMOS digital video processing integrated circuits, the color filter array (CFA) processor and the RGB postprocessor. The system uses a 768 × 484 active element interline transfer CCD with a new field-staggered 3G color filter pattern and a lenslet overlay, which doubles the sensitivity of the camera. The industrial-quality digital camera design offers improved image quality, reliability, and manufacturability, while meeting aggressive size, power, and cost constraints. The CFA processor digital VLSI chip includes color filter interpolation processing, an optical black clamp, defect correction, white balance, and gain control. The RGB postprocessor digital integrated circuit includes a color correction matrix, gamma correction, two-dimensional edge enhancement, and circuits to control the black balance, lens aperture, and focus.
Kenneth A. Parulski, Lionel J. D'Luna, Brian L. Benamati, Paul R. Shelley, "High-performance digital color video camera," Journal of Electronic Imaging 1(1), (1 January 1992). http://dx.doi.org/10.1117/12.55183
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KEYWORDS
Cameras

Signal processing

RGB color model

Video

Optical filters

CCD image sensors

Digital cameras

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