Expectation maximization to determine position of ambient glints
US-9268024-B1 · Feb 23, 2016 · US
Expectation Maximization to Determine Position of Ambient Glints
US2016110883A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2016110883-A1 |
| Application number | US-201514982330-A |
| Country | US |
| Kind code | A1 |
| Filing date | Dec 29, 2015 |
| Priority date | Jan 6, 2012 |
| Publication date | Apr 21, 2016 |
| Grant date | — |
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Abstract
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Exemplary embodiments may involve analyzing reflections from an eye to help determine where the respective sources of the reflections are located. An exemplary method involves: (a) analyzing eye-image data to determine observed movement of a reflected feature on an eye surface; (b) determining an expected movement of the reflected feature on the eye surface given a value of a z-distance parameter; (c) determining a difference between the observed movement of the reflected feature on the eye surface and the expected movement of the reflected feature on the eye surface; (d) if the difference is less than a threshold, then associating the value of the z-distance parameter with a source of the reflected feature; and (e) if the difference is greater than the threshold, then: (i) making a predetermined adjustment to the value of the z-distance parameter; and (ii) repeating (a) to (d) with the adjusted value of the z-distance parameter.
First claim
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I claim: 1 . A method comprising: (a) analyzing eye-image data to determine observed movement of a reflected feature on an eye surface; (b) determining an expected movement of the reflected feature on the eye surface given a value of a z-distance parameter; (c) determining a difference between the observed movement of the reflected feature on the eye surface and the expected movement of the reflected feature on the eye surface; (d) if the difference is less than a threshol…
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Physics · mapped topic
Physics · mapped topic
Physics · mapped topic
Physics · mapped topic
Physics · mapped topic
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Frequently asked questions
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- What does patent US2016110883A1 cover?
- Exemplary embodiments may involve analyzing reflections from an eye to help determine where the respective sources of the reflections are located. An exemplary method involves: (a) analyzing eye-image data to determine observed movement of a reflected feature on an eye surface; (b) determining an expected movement of the reflected feature on the eye surface given a value of a z-distance paramet…
- Who is the assignee on this patent?
- Google Inc
- What technology area does this patent fall under?
- Primary CPC classification G06T7/2033. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Thu Apr 21 2016 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).