Apparatus and method for eliminating artifacts in active pixel sensor (APS) imagers
First Claim
Patent Images
1. An active pixel sensor comprising:
- a photodetecting means for outputting an output level indicative of incoming light;
a storage means for storing said output level;
a comparing means for comparing said output level to an adjusted saturation voltage; and
an output selecting means for outputting an adjusted maximum voltage during pixel readout when said comparing means determines that said adjusted saturation voltage exceeds said output level.
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Abstract
An active pixel sensor (APS) that includes circuitry to eliminate artifacts in digital images. The APS includes a comparator for comparing a signal level from a pixel to an adjusted saturation voltage to determine if the pixel is saturated. If the pixel is saturated, the signal output from the pixel is replaced with an analog voltage having a maximum value corresponding to a brightest pixel in the image.
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Citations
12 Claims
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1. An active pixel sensor comprising:
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a photodetecting means for outputting an output level indicative of incoming light; a storage means for storing said output level; a comparing means for comparing said output level to an adjusted saturation voltage; and an output selecting means for outputting an adjusted maximum voltage during pixel readout when said comparing means determines that said adjusted saturation voltage exceeds said output level. - View Dependent Claims (2, 3, 4, 5)
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6. An active pixel sensor comprising:
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a photodetector for outputting an output level indicative of incident light; a storage element for storing said output level; a first circuit for comparing said output level to an adjusted saturation voltage; and a second circuit for outputting an adjusted maximum voltage when said first circuit determines that said adjusted saturation voltage exceeds said output level. - View Dependent Claims (7, 8, 9, 10)
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11. An active pixel sensor comprising:
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a photodector; a first circuit for comparing an output level from said photodetector to an adjusted saturation voltage; and a second circuit for replacing said output level with an adjusted maximum voltage when said first circuit determines that said output level falls below an adjusted saturation voltage. - View Dependent Claims (12)
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Specification