Method and Apparatus for Correcting Excess Signals in an Imaging System
First Claim
Patent Images
1. A method, comprising:
- estimating an excess signal based on a combination of a first and a second non-linear decay response model of a measured signal of an image frame of an imaging system; and
compensating for the excess signal in the image frame using the estimated excess signal.
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Abstract
A method and apparatus for excess signal compensation in an imaging system is described. In one particular embodiment, the invention provides for non-linear background, offset (due to time dependent dark current) and/or lag (including constant, linear and non-linear terms, due to image persistence) corrections of large area, flat panel imaging sensors.
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Citations
18 Claims
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1. A method, comprising:
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estimating an excess signal based on a combination of a first and a second non-linear decay response model of a measured signal of an image frame of an imaging system; and compensating for the excess signal in the image frame using the estimated excess signal. - View Dependent Claims (2, 3)
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4. A method, comprising:
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estimating an excess signal based on a combination of a non-linear decay response model and a linear decay response model of a measured signal of an image frame of an imaging system; and compensating for the excess signal in the image frame using the estimated excess signal. - View Dependent Claims (5, 6)
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7. A method, comprising:
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estimating an excess signal based on a non-linear decay response model and a frame rate; and compensating for the excess signal in the image frame of an imaging system; wherein the frame rate is faster than one tenth of a frame per second. - View Dependent Claims (8, 9, 10)
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11. A method, comprising:
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estimating an excess signal based on a non-linear decay response model of a combination of saturated and non-saturated frames of a measured signal of an image frame of an imaging system; and compensating for the excess signal in the image frame using the estimated excess signal. - View Dependent Claims (12, 13)
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14. A method, comprising:
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estimating an excess signal based on a non-linear time variant decay response model of a measured signal of an image frame of an imaging system; and subtracting the excess signal from the measured signal of the image frame.
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15. A method, comprising:
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estimating an excess signal based on a non-linear decay response model of a measured signal of an image frame of an imaging system; and compensating for the excess signal in the image frame, wherein estimating the excess signal further comprises selecting a first reference image frame and selecting a second reference image frame. - View Dependent Claims (16, 17, 18)
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Specification