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Solid-state imager defect corrector

  • US 4,739,495 A
  • Filed: 09/25/1985
  • Issued: 04/19/1988
  • Est. Priority Date: 09/25/1985
  • Status: Expired due to Fees
First Claim
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1. Imaging apparatus, comprising:

  • solid state imaging means including an array of photosensitive elements for providing image-representative signal including nonimage-representative signal components, said photosensitive elements include a certain group of member elements, less in number than the total number of photosensitive elements in said array, having nonimage-representative signal component amplitudes which deviate by at least a given amount from a reference level;

    means providing a pluarlity of element location signals which identify the locations in said array of members of said certain group of photosensitive elements;

    means providing respective correction signals for member photosensitive elements in said certain group, said correction signals having an amplitude related to the deviation of the nonimage-representative signal components from said reference level;

    means responsive to said image-representative signals and said element location signals for combining respective ones of said correction signals with corresponding image-representative signals identified by said element location signals in a manner to provide an output signal compensated for the deviation of said nonimage-representative signal components of said certain group of photosensitive elements; and

    means responsive to said nonimage-representative signal components of said array and said element location signals for periodically updating the amplitude of said correction signals.

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