System and method for variable illumination intelligent imaging of billion pixel light field
US-2024422446-A1 · Dec 19, 2024 · US
Methods and apparatus for high speed camera
US9106841B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9106841-B2 |
| Application number | US-201414304566-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jun 13, 2014 |
| Priority date | Jun 18, 2013 |
| Publication date | Aug 11, 2015 |
| Grant date | Aug 11, 2015 |
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Abstract
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In exemplary implementations of this invention, a light source illuminates a scene and a light sensor captures data about light that scatters from the scene. The light source emits multiple modulation frequencies, either in a temporal sequence or as a superposition of modulation frequencies. Reference signals that differ in phase are applied to respective subregions of each respective pixel. The number of subregions per pixel, and the number of reference signals per pixel, is preferably greater than four. One or more processors calculate a full cross-correlation function for each respective pixel, by fitting light intensity measurements to a curve, the light intensity measurements being taken, respectively, by respective subregions of the respective pixel. The light sensor comprises M subregions. A lenslet is placed over each subregion, so that each subregion images the entire scene. At least one temporal sequence of frames is taken, one frame per subregion.
First claim
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What is claimed is: 1. A method comprising: (a) during a time period, using a light source to illuminate a scene; (b) during the time period, using a light sensor to capture data about light that scatters from the scene; (c) during the time period, for each respective pixel in a set of pixels in the light sensor, applying a set of electrical reference signals to subregions of the respective pixel, such that (i) each respective reference signal in the set of electrical referenc…
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Frequently asked questions
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- What does patent US9106841B2 cover?
- In exemplary implementations of this invention, a light source illuminates a scene and a light sensor captures data about light that scatters from the scene. The light source emits multiple modulation frequencies, either in a temporal sequence or as a superposition of modulation frequencies. Reference signals that differ in phase are applied to respective subregions of each respective pixel. Th…
- Who is the assignee on this patent?
- Raskar Ramesh, Barsi Christopher, Massachusetts Inst Technology
- What technology area does this patent fall under?
- Primary CPC classification H04N23/74. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Aug 11 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).