Methods and system for spectral image sampling
OwnerTripurari Singh, Mritunjay Singhinventors
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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.
Claims38
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 quality;
- and
- processing the detected image intensity values to infer the image.
A method of sampling an image comprising:
- 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.
An image sampling apparatus comprising:
- 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.
A method of sampling at least one image, the method comprising:
- 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.
A method of processing at least one color image, the method comprising:
- receiving a detected electromagnetic radiation, the electromagnetic radiation being representative of an image;
- and
- storing a mosaicked representation of the image on a machine readable medium, wherein the representation of the image includes a plurality of indications of magnitudes of light, each magnitude of light corresponding to a magnitude of at least one color of light at one of a plurality of locations in the image, and wherein a frequency domain representation of the plurality of magnitudes of light has a channel shape that is substantially non-square and in which chrominance and luminance are positioned to minimize overlap in the frequency domain representation.
A method for image processing, the method comprising the steps of:
- transforming image data into at a luminance signal and a chrominance signal wherein a frequency domain representation of the luminance signal and the chrominance signal is contained within a non-square rectangular shape and wherein overlap between the luminance signal and the chrominance signal in the frequency domain representation is minimized;
- and
- processing the image data to infer an image.
Dependencies are inferred from the claim text.