Importance

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Abstract

A pixel artifact/blemish filter for use in a CCD video camera which produces a video signal composed of a series of pulses, each representing a pixel, for developing a video image. The filter includes a delay line for receiving the video signal produced by the camera, and for delaying the video signal pulses by a time of approximately one pulse width duration. The filter also includes first and second signal transfer elements for receiving respectively each video signal pulse directly from the camera and each most recently delayed video signal, and for passing either the directly received pulse or the delayed pulse, depending upon the relative magnitude of the two pulses. Since pixel artifact pulses are typically more positive than non-artifacts pulses, the signal transfer elements generally pass the more negative video signal pulses so that the pixel artifact pulses are suppressed when they arrive at the transfer elements.

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First Claim