Methods and system for spectral image sampling
First Claim
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1. A method of sampling an image comprising:
- projecting an image onto an array of optical transformation devices;
detecting image intensity values transmitted by said array of optical transformation devices at each sensor element of an image sensor, the image sensor comprising a plurality of photosensitive sensor elements configured to detect a magnitude of incident light, wherein said sensor elements are shaped as regular polygons whose aspect ratio is controlled to minimize sensor element count while obtaining a desired image resolution; and
processing the detected image intensity values to infer the image.
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Abstract
The present invention relates to spectral image sampling. An image is projected onto an array of optical transformation devices. Image intensity values transmitted by said array of optical transformation devices are detected at each sensor element of an image sensor. The image sensor comprises a plurality of photosensitive sensor elements configured to detect a magnitude of incident light, wherein said sensor elements are shaped as regular polygons whose aspect ratio is controlled to minimize sensor element count while obtaining a desired image quality. The detected image intensity values are processed to infer the image.
14 Citations
23 Claims
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1. A method of sampling an image comprising:
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projecting an image onto an array of optical transformation devices; detecting image intensity values transmitted by said array of optical transformation devices at each sensor element of an image sensor, the image sensor comprising a plurality of photosensitive sensor elements configured to detect a magnitude of incident light, wherein said sensor elements are shaped as regular polygons whose aspect ratio is controlled to minimize sensor element count while obtaining a desired image resolution; and processing the detected image intensity values to infer the image. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of sampling an image comprising:
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projecting an image onto a color filter array wherein said color filter array is configured according to a desired resolution for a detected chrominance signal; detecting image intensity values transmitted through said color filter array at each sensor element of an image sensor, the image sensor comprising a plurality of photosensitive sensor elements configured to detect a magnitude of incident light; and processing the detected image intensity values to infer the image. - View Dependent Claims (13, 14)
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15. An image sampling apparatus comprising:
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a color filter array comprising a plurality of color filters, the color filter array being configured such that, in at least one frequency domain representation of at least one image captured using the plurality of photosensitive elements, at least one spectral copy of a chrominance signal is positioned so as to minimize overlap between the chrominance signal and a luminance signal in the at least one frequency domain representation, and wherein the color filters of the color filter array each has a non-square rectangular shape; an image sensor comprising a plurality of photosensitive sensor elements, each sensor element configured to detect a magnitude of incident light; and a processor for receiving detected image intensity values. - View Dependent Claims (16, 17, 18, 19)
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20. A method of sampling at least one image, the method comprising:
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filtering electromagnetic radiation using a color filter array comprising a plurality of color filters, the color filter array being configured such that, in at least one frequency domain representation of at least one image captured using the plurality of photosensitive elements, at least one spectral copy of a chrominance signal is positioned so as to minimize overlap between the chrominance signal and a luminance signal in the at least one frequency domain representation, and wherein the color filters of the color filter array each has a non-square rectangular shape; and detecting the filtered electromagnetic radiation with an image sensor comprising a plurality of photosensitive sensor elements, each sensor element configured to detect a magnitude of incident light; and processing the detected electromagnetic radiation to infer an image. - View Dependent Claims (21, 22, 23)
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Specification