US7006950B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Statistical modeling and performance characterization of a real-time dual camera surveillance system
Assignee: Siemens Corp
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Filing: 2000-06-12
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Granted: 2006-02-28
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Expires: 2020-06-12
Abstract
Abstract The present invention relates to a method for visually detecting and tracking an object through a space. The method chooses modules for a restricting a search function within the space to regions with a high probability of significant change, the search function operating on images supplied by a camera. The method also derives statistical models for errors, including quantifying an indexing step performed by an indexing module, and tuning system parameters. Further the method applies a likelihood model for candidate hypothesis evaluation and object parameters estimation for locating the object.
Inventors
- 👤 Michael Greiffenhagen
- 👤 Visvanathan Ramesh
- 👤 Dorin Comaniciu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 11:48
CPC Classifications
H; H04; H04N; H04N7/00; H04N7/18; H04N7/181; G; G06; G06T; G06T7/00; G06T7/20; G06T7/277; G06T7/70; G06T7/77; G08; G08B; G08B13/00; G08B13/18; G08B13/189; G08B13/194; G08B13/196; G08B13/19602; G08B13/19604; G08B13/19608; G08B13/19617; G08B13/19626; G08B13/19628; G08B13/19639; G08B13/19641; G08B13/19643; G08B13/19647; H04N23/00; H04N23/60; H04N23/695; G06T2207/00; G06T2207/30; G06T2207/30196; G06T2207/30232; G06T2207/30241
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
100 words
A method for visually locating and tracking an object through a space, comprising the steps of: restricting an area of the space to be searched to a plurality of regions with a high probability of significant change, the space being defined in images supplied by a camera; deriving statistical models for errors, including quantifying an indexing step performed by an indexing module, and tuning system parameters, wherein each statistical model is a candidate hypothesis for object location; applying a likelihood model for candidate hypothesis evaluation; and locating the object according to a candidate hypothesis evaluated to satisfy the likelihood model.
Claim 2
Independent Claim
100 words
A method for visually locating and tracking an object through a space, comprising the steps of: restricting an area of the space to be searched to a plurality of regions with a high probability of significant change, the space being defined in images supplied by a camera; deriving statistical models for errors, including quantifying an indexing step performed by an indexing module, and tuning system parameters, wherein each statistical model is a candidate hypothesis for object location; applying a likelihood model for candidate hypothesis evaluation; and locating the object according to a candidate hypothesis evaluated to satisfy the likelihood model.
Claim 3
Dependent Claim
51 words
The method of claim 1 , wherein restricting the area of the space to be searched further comprises the steps of: applying a calibration module for determining a static scene; applying an illumination-invariant module for tracking image transformation; and applying the indexing module for selecting regions of interest for hypothesis generation.
Claim 4
Dependent Claim
49 words
The method of claim 2 , further comprising the steps of: applying a statistical estimation module for estimating a number of objects and their positions; and applying a foveal camera control module for estimating a plurality of control parameters of a foveal camera based on location estimates and uncertainties.
Claim 5
Dependent Claim
27 words
The method of claim 2 , further comprising the step of applying a background adaptation module for detecting and tracking the object in dynamically varying illumination situations.
Claim 6
Dependent Claim
27 words
The method of claim 1 , wherein an application specific module is provided based on a plurality of prior distributions for imposing restrictions on the candidate hypotheses.
Claim 7
Dependent Claim
29 words
The method of claim 5 , wherein the plurality of prior distributions comprise: an object geometry model; a camera geometry model; a camera error model; and an illumination model.
Claim 8
Dependent Claim
12 words
The method of claim 1 , wherein the camera is an omnicamera.
Claim 9
Dependent Claim
15 words
The method of claim 1 , wherein the object is tracked using a foveal camera.
Claim 10
Dependent Claim
30 words
The method of claim 1 , wherein the step of deriving statistical models is applied a plurality of times to achieve a given probability of misdetection and false alarm rate.
Claim 11
Dependent Claim
25 words
The method claim 9 , further comprising the step of validating a theoretical model for the space monitored for determining correctness and closeness to reality.
Claim 12
Dependent Claim
47 words
The method of claim 1 , wherein the indexing module selects a plurality of regions with a high probability of significant change, motivated by a plurality of two dimensional image priors induced by a plurality of prior distributions in the space, wherein the space is three dimensional.
Claim 13
Dependent Claim
27 words
The method of claim 1 , further comprising estimating an uncertainty of the object's parameters for predicting a system's performance and for automating control of the system.
Claim 14
Dependent Claim
29 words
The method of claim 1 , employed in an automobile wherein the space monitored comprises one of an interior compartment of the automobile and an exterior of the automobile.
Claim 15
Dependent Claim
20 words
The method of claim 1 , wherein the candidate hypothesis evaluated that satisfies the likelihood model minimizes a Bayes error.
Claim 16
Dependent Claim
137 words
A computer program product comprising computer program code stored on a computer readable storage medium for, for locating and tracking objects through a space, the computer program product comprising: computer readable program code for causing a computer to restrict an area of the space to be search to a plurality of regions with a high probability of significant change within the space; computer readable program code for causing a computer to derive statistical models for errors, including quantifying an indexing step, and tuning system parameters, wherein each statistical model is a candidate hypothesis for object location; computer readable program code for causing a computer to apply a likelihood model for candidate hypothesis evaluation; and computer readable program code for causing a computer to locate the object according to a candidate hypothesis evaluated to satisfy the likelihood model.
Claim 17
Dependent Claim
137 words
A computer program product comprising computer program code stored on a computer readable storage medium for, for locating and tracking objects through a space, the computer program product comprising: computer readable program code for causing a computer to restrict an area of the space to be search to a plurality of regions with a high probability of significant change within the space; computer readable program code for causing a computer to derive statistical models for errors, including quantifying an indexing step, and tuning system parameters, wherein each statistical model is a candidate hypothesis for object location; computer readable program code for causing a computer to apply a likelihood model for candidate hypothesis evaluation; and computer readable program code for causing a computer to locate the object according to a candidate hypothesis evaluated to satisfy the likelihood model.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2009-02-27 | 2009-08-29 | 2010-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2013-02-27 | 2013-08-29 | 2014-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2017-02-27 | 2017-08-29 | 2018-02-28 | $7700.00 | Window Closed / Lapsed |