Method and apparatus for dynamic correction of microscopic image signals
First Claim
1. Apparatus for dynamically correcting an image signal comprising:
- camera means for providing an image signal, wherein the image signal represents a tranmissivity of an object;
light means for providing light to illuminate the object and for providing a light signal indicative of the intensity of said light; and
data processing means responsive to said light signal for dynamically correcting said image signal so that said image signal is corrected for variations in the intensity of said light.
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Accused Products
Abstract
A circuit is provided for correcting an image signal received from a camera wherein the camera includes a plurality of charge coupled devices, each for providing a light signal indicative of the intensity of light incident thereon and wherein the plurality of light signals from the plurality of charge coupled devices are indicative of an image received by the camera. The correction circuit includes a gain memory for storing a plurality of gain correction factors wherein each gain correction factor is associated with a respective charge coupled device of the camera. The correction circuit further includes an offset memory for storing a plurality of offset correction factors wherein each offset correction factor is associated with a respective one of the plurality of charged coupled devices. The gain memory is responsive to a control circuit for multiplying the plurality of electric signals by the appropriate gain correction factor. Similarly, the offset memory is responsive to a control circuit for adding the appropriate one of the plurality of offset correction factors with the signal from its respective charge coupled device. A light detection circuit is also provided for normalizing the corrected plurality of signal to make the resulting measurement a measurement of the percentage of transmission of the focused slide specimen.
72 Citations
22 Claims
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1. Apparatus for dynamically correcting an image signal comprising:
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camera means for providing an image signal, wherein the image signal represents a tranmissivity of an object; light means for providing light to illuminate the object and for providing a light signal indicative of the intensity of said light; and data processing means responsive to said light signal for dynamically correcting said image signal so that said image signal is corrected for variations in the intensity of said light. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A circuit for correcting an image signal comprising:
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camera means for providing an image signal, wherein the image signal represents a transmissivity of an object and wherein the camera includes a plurality of charge coupled devices for providing a respective plurality of pixel signals wherein the plurality of pixel signals combine to provide the image signal; memory means for storing a plurality of correction factors wherein each of said plurality of correction factors is associated with a respective one of the plurality of charge couples devices; signal processing means for combining each of said plurality of correction factors with the respective one of the plurality of pixel signals with which it is associated; and light means for providing light to illuminate the object and for providing a light signal indicative of the intensity of said light, said signal processing means being responsive to said light signal for altering said plurality of correction factors. - View Dependent Claims (11, 12, 13, 14)
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15. An apparatus for dynamically correcting an image signal provided by a camera wherein the image signal represents a transmissivity of an object, said apparatus comprising:
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light means for providing light to illuminate the object and for providing a light signal indicative of the intensity of said light; and data processing means responsive to said light signal for dynamically correcting said image signal so that said image signal is corrected for variations in the intensity of said light wherein said data processing means comprises an analog-to-digital converter having an analog input for receiving the image signals and a reference input for receiving said light signal, said analog-to-digital converter having an output providing the corrected image signals. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22)
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Specification