Solid-state imager defect corrector
First Claim
Patent Images
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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Abstract
A defect corrector for a solid-state imager having a number of defective pixels less than the total number of pixels in the imager in which only defect correction signals associated with the defective pixels are generated. The defect correction signals are then combined with photoresponse signals from the corresponding defective pixels, so as to provide a defect compensated photoresponse signal for each of the defective pixels.
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Citations
13 Claims
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1. Imaging apparatus, comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification