Estimating sensor sensitivity
First Claim
Patent Images
1. A computer-implemented method, comprising:
- de-noising an image to generate a de-noised image from the image;
determining a noise signature of the image, wherein said determining the noise signature is based on differences between the image and the de-noised image; and
automatically determining an estimate of sensor sensitivity associated with the image based on the determined noise signature, wherein the sensor sensitivity is of a sensor used to capture the image.
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Abstract
A method, system, and computer-readable storage medium for determining an estimate of sensor sensitivity associated with an image. A noise level of an image is determined, then an estimate of sensor sensitivity associated with the image is automatically determined, e.g., by a trained classifier based on the determined noise level. Additionally, the sensor sensitivity estimate can be used to determine scene brightness.
9 Citations
40 Claims
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1. A computer-implemented method, comprising:
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de-noising an image to generate a de-noised image from the image; determining a noise signature of the image, wherein said determining the noise signature is based on differences between the image and the de-noised image; and automatically determining an estimate of sensor sensitivity associated with the image based on the determined noise signature, wherein the sensor sensitivity is of a sensor used to capture the image. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A non-transitory computer-readable storage medium that stores program instructions computer-executable to implement:
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de-noising an image to generate a de-noised image from the image; determining a noise signature of the image, wherein said determining the noise signature is based on differences between the image and the de-noised image; and automatically determining an estimate of sensor sensitivity associated with the image based on the determined noise signature, wherein the sensor sensitivity is of a sensor used to capture the image. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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27. A system, comprising:
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at least one processor; and a memory coupled to the at least one processor, wherein the memory stores program instructions, wherein the program instructions are executable by the at least one processor to; de-noise an image to generate a de-noised image from the image; determine a noise signature of the image, wherein said determining the noise signature is based on differences between the image and the de-noised image; and automatically determine an estimate of sensor sensitivity associated with the image based on the determined noise signature, wherein the sensor sensitivity is of a sensor used to capture the image. - View Dependent Claims (28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39)
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40. A computer-implemented method, comprising:
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executing instructions on a computing platform, the instructions for de-noising an image so that a de-noised image is generated from the image; executing instructions on a computing platform so that binary digital electronic signals representing a noise signature of the image are determined, wherein said determined noise signature is based on differences between the image and the de-noised image; executing instructions on the computing platform so that binary digital electronic signals representing an estimate of sensor sensitivity associated with the image are determined based on the noise signature, wherein the sensor sensitivity is of a sensor used to capture the image; and storing an indication of the determined estimate of sensor sensitivity.
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Specification