Patent EP0929184A2 successfully refreshed from Google Patents.
US6519002B1
Expired / Lapsed
US
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Method and apparatus to minimize flicker effects from a discharge light source during digital video capture
Assignee: Intel Corp
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Filing: 1998-08-31
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Granted: 2003-02-11
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Expires: 2018-08-31
Abstract
Abstract A method having the step of setting a programmable clock to a first frequency; capturing a first set of frames at the first frequency; and then determining a first standard deviation of a first set of average intensities for the first set of frames. In addition, the method also includes the steps of setting the programmable clock to a second frequency; capturing a second set of frames at the second frequency; and determining a second standard deviation of a second set of average intensities for the second set of frames. Then, comparing the first standard deviation with the second standard deviation; and, setting the programmable clock based on the comparison.
Inventors
- 👤 Edward P. Tomaszewski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 12:20
CPC Classifications
H; H04; H04N; H04N23/00; H04N23/70; H04N23/745
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
98 words
An method comprising: setting a programmable clock to a first frequency; capturing a first set of frames at said first frequency; determining a first standard deviation of a first set of average intensities for said first set of frames; setting said programmable clock to a second frequency; capturing a second set of frames at said second frequency; determining a second standard deviation of a second set of average intensities for said second set of frames; comparing said first standard deviation with said second standard deviation; and, setting said programmable clock based at least in part on said comparison.
Claim 2
Independent Claim
98 words
An method comprising: setting a programmable clock to a first frequency; capturing a first set of frames at said first frequency; determining a first standard deviation of a first set of average intensities for said first set of frames; setting said programmable clock to a second frequency; capturing a second set of frames at said second frequency; determining a second standard deviation of a second set of average intensities for said second set of frames; comparing said first standard deviation with said second standard deviation; and, setting said programmable clock based at least in part on said comparison.
Claim 3
Dependent Claim
82 words
The method of claim 1 , where said step of determining said first standard deviation comprises the step of: determining a first mean intensity of said first set of average intensities; and, determining a standard deviation by the equation: σ = X i 2 n - ( X _ ) 2 where n is the number of frames in said first set of frames and X i is an average intensity of frame i and {overscore (X)} is said first mean intensity.
Claim 4
Dependent Claim
55 words
The method of claim 2 , wherein said step of determining said first mean intensity comprises the step of determining a mean by the equation: X _ = ∑ X i n where n is a number of frames in said first set of frames and X i is an average intensity of frame i.
Claim 5
Dependent Claim
82 words
The method of claim 1 , where said step of determining said second standard deviation comprises the step of: determining a second mean intensity of said second set of average intensities; and, determining a standard deviation by the equation: σ = X i 2 n - ( X _ ) 2 where n is the number of frames in said second set of frames and X i is an average intensity of frame i and {overscore (X)} is said second mean intensity.
Claim 6
Dependent Claim
55 words
The method of claim 4 , wherein said step of determining said second mean intensity comprises the step of determining a mean by the equation: X _ = ∑ X i n where n is a number of frames in said second set of frames and X i is an average intensity of frame i.
Claim 7
Dependent Claim
57 words
The method of claim 1 , where said step of setting said programmable clock based on said comparison comprises the steps of: determining if said first standard deviation is smaller than said second standard deviation; and, if said first standard deviation is smaller than said second standard deviation, then setting said programmable clock to said first frequency.
Claim 8
Dependent Claim
58 words
The method of claim 1 , where said step of setting said programmable clock based on said comparison comprises the steps of: determining if said first standard deviation is larger than said second standard deviation; and, if said first standard deviation is larger than said second standard deviation, then said programmable clock is set to said second frequency.
Claim 9
Dependent Claim
110 words
An article comprising: a computer readable medium having instructions stored thereon which when executed performs: setting a programmable clock to a first frequency; capturing a first set of frames at said first frequency; determining a first standard deviation of a first set of average intensities for said first set of frames; setting said programmable clock to a second frequency; capturing a second set of frames at said second frequency; determining a second standard deviation of a second set of average intensities for said second set of frames; comparing said first standard deviation with said second standard deviation; and, setting said programmable clock based at least in part on said comparison.
Claim 10
Dependent Claim
110 words
An article comprising: a computer readable medium having instructions stored thereon which when executed performs: setting a programmable clock to a first frequency; capturing a first set of frames at said first frequency; determining a first standard deviation of a first set of average intensities for said first set of frames; setting said programmable clock to a second frequency; capturing a second set of frames at said second frequency; determining a second standard deviation of a second set of average intensities for said second set of frames; comparing said first standard deviation with said second standard deviation; and, setting said programmable clock based at least in part on said comparison.
Claim 11
Dependent Claim
77 words
The article of claim 8 , wherein said determining said first standard deviation includes: determining a first mean intensity of said first set of average intensities; and, determining a standard deviation by the equation: σ = X i 2 n - ( X _ ) 2 where n is the number of frames in said first set of frames and X i is an average intensity of frame i and {overscore (X)} is said first mean intensity.
Claim 12
Dependent Claim
50 words
The article of claim 9 , wherein said determining said first mean intensity includes determining a mean by the equation: X _ = ∑ X i n where n is a number of frames in said first set of frames and X i is an average intensity of frame i.
Claim 13
Dependent Claim
77 words
The article of claim 8 , wherein said determining said second standard deviation includes: determining a second mean intensity of said second set of average intensities; and, determining a standard deviation by the equation: σ = X i 2 n - ( X _ ) 2 where n is the number of frames in said second set of frames and X i is an average intensity of frame i and {overscore (X)} is said second mean intensity.
Claim 14
Dependent Claim
50 words
The article of claim 11 , wherein said determining said second mean intensity includes determining a mean by the equation: X _ = ∑ X i n where n is a number of frames in said second set of frames and X i is an average intensity of frame i.
Claim 15
Dependent Claim
52 words
The article of claim 8 , wherein said setting said programmable clock based on said comparison includes: determining if said first standard deviation is smaller than said second standard deviation; and, if said first standard deviation is smaller than said second standard deviation, then setting said programmable clock to said first frequency.
Claim 16
Dependent Claim
52 words
The article of claim 8 , wherein said setting said programmable clock based on said comparison includes: determining if said first standard deviation is larger than said second standard deviation; and, if said first standard deviation is larger than said second standard deviation, then setting said programmable clock to said second frequency.
Claim 17
Dependent Claim
132 words
An imaging system comprising: an image sensor; a controller having a programmable clock coupled to said image sensor; a computer readable medium coupled to said controller having instructions stored thereon which when executed, causes said controller to: set said programmable clock to a first frequency; capture a first set of frames at said first frequency; determine a first standard deviation of a first set of average intensities for said first set of frames; set said programmable clock to a second frequency; capture a second set of frames at said second frequency; determine a second standard deviation of a second set of average intensities for said second set of frames; compare said first standard deviation with said second standard deviation; and, set said programmable clock based at least in part on said comparison.
Claim 18
Dependent Claim
132 words
An imaging system comprising: an image sensor; a controller having a programmable clock coupled to said image sensor; a computer readable medium coupled to said controller having instructions stored thereon which when executed, causes said controller to: set said programmable clock to a first frequency; capture a first set of frames at said first frequency; determine a first standard deviation of a first set of average intensities for said first set of frames; set said programmable clock to a second frequency; capture a second set of frames at said second frequency; determine a second standard deviation of a second set of average intensities for said second set of frames; compare said first standard deviation with said second standard deviation; and, set said programmable clock based at least in part on said comparison.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 2006-02-10 | 2006-08-12 | 2007-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2010-02-10 | 2010-08-12 | 2011-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2014-02-10 | 2014-08-12 | 2015-02-11 | $7700.00 | Window Closed / Lapsed |