Methods and systems for reducing image artifacts
AssigneeRambus Inc.
InventorsPatrick R. Gill, Thomas Vogelsang
Life of this patent
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Abstract
An imaging system with a diffractive optic captures an interference pattern responsive to light from an imaged scene to represent the scene in a spatial-frequency domain. The sampled frequency-domain image data has properties that are determined by the point-spread function of diffractive optic and characteristics of scene. An integrated processor can modified the sampled frequency-domain image data responsive to such properties before transforming the modified frequently-domain image data into the pixel domain.
Claims20
A method for imaging a scene, the method comprising:
- modulating light from the scene using a diffractive optic to produce an interference pattern;
- sampling the interference pattern to acquire sampled frequency-domain image data representing the scene;
- modifying the sampled frequency-domain image data responsive to an image property of the sampled frequency-domain image data to produce modified frequency-domain data;
- and
- after modifying the sampled frequency-domain image data, transforming the modified frequency-domain image data into a pixel-domain image of the scene.
A method for imaging a scene, the method comprising:
- modulating light from the scene using a diffractive optic to produce an interference pattern;
- sampling the interference pattern to acquire sampled frequency-domain image data representing the scene;
- and
- modifying the sampled frequency-domain image data responsive to an image property of the sampled frequency-domain image data;
- wherein the image property represents a low-confidence area;
- and
- wherein modifying the sampled frequency-domain image data responsive to the image property comprises in-filling the low-confidence area to produce the modified frequency-domain image data.
A method for imaging a scene, the method comprising:
- modulating light from the scene using a diffractive optic to produce an interference pattern;
- sampling the interference pattern to acquire sampled frequency-domain image data representing the scene;
- modifying the sampled frequency-domain image data responsive to an image property of the sampled frequency-domain image data;
- and
- identifying a saturation region in the sampled frequency-domain image data and extrapolating intensity values within the saturation region.
An imaging system comprising:
- a diffractive optic to produce an interference pattern representing an imaged scene in a spatial-frequency domain;
- an array of photosensitive elements to sample the interference pattern as sampled frequency-domain image data representing the scene;
- and
- a processor to modify the sampled frequency-domain image data responsive to an image property of the sampled frequency-domain image data;
- wherein the diffractive optic exhibits a point-spread function, and wherein the processor applies a correction pattern that is a function of the point-spread function to the sampled frequency-domain image data;
- and
- wherein the diffractive optic exhibits a rotationally symmetric and circularly asymmetric point-spread function.
A method for imaging a scene, the method comprising:
- modulating light from the scene using a diffractive optic to produce an interference pattern;
- sampling the interference pattern to acquire sampled frequency-domain image data representing the scene;
- modifying the sampled frequency-domain image data responsive to an image property of the sampled frequency-domain image data to produce modified frequency-domain data;
- and
- after modifying the sampled frequency-domain image data, processing the modified frequency-domain image data to form a sensing measurement.
Dependencies are inferred from the claim text.