Patent application number | Description | Published |
20080226172 | Method and Apparatus for Maintaining a Background Image Model in a Background Subtraction System Using Accumulated Motion - Methods and apparatus are provided for maintaining a background image model in a background subtraction system using accumulated motion. A background image model is maintained by obtaining a map of accumulated motion; and adjusting the background image model based on the map of accumulated motion. The map of accumulated motion may be obtained, for example, based on one or more of motion field images; stability maps; frame differences; or information from a background subtraction system. Objects can be added to or removed from the background model or the background model can be otherwise updated One or more pixels from an image are added to the background image model if a stability measure for the one or more pixels satisfies a predefined criteria. A portion of the background image model can be invalidated in regions where the map of accumulated motion exceeds a predefined threshold. | 09-18-2008 |
20080226189 | Method and Apparatus for Visual Background Subtraction with One or More Preprocessing Modules - Methods and apparatus are provided for visual background subtraction using one or more preprocessing modules. One or more effects are detected in a received image signal and one or more blocks are selectively enabled to preprocess the image signal to compensate for the detected one or more effects. Visual analysis is then performed on the preprocessed signal using background subtraction. A spatially-variant temporal smoothing of the image signal is also disclosed. The spatially-variant temporal smoothing can be achieved by the mixing of a new intensity value with a previous intensity time-average as determined by a weighting matrix. The mixing can be influenced by a dynamic bias term that is a real-time estimate of a valiance at the pixel, such as a degree of change, and the weighting can be determined by a relative stability of an observed value compared to a stability of the time-average. | 09-18-2008 |
20080231706 | SYSTEM AND METHOD FOR MANAGING MOVING SURVEILLANCE CAMERAS - An approach that manages moving surveillance cameras is described. In one embodiment, there is a system for managing images generated from a movable camera. In this embodiment, the system comprises a motion estimation component configured to determine camera motion. A camera motion alert component is configured to generate an alert in response to a determination that the camera has moved or the camera has ceased moving. | 09-25-2008 |
20080231709 | SYSTEM AND METHOD FOR MANAGING THE INTERACTION OF OBJECT DETECTION AND TRACKING SYSTEMS IN VIDEO SURVEILLANCE - A system, method and program product for providing a video surveillance system that enhances object detection by utilizing feedback from a tracking system to an object detection system. A system is provided that includes: a moving object detection system for detecting moving objects in a video input; an object tracking system for tracking a detected moving object in successive time instants; and a tracker feedback system for feeding tracking information from the object tracking system to the moving object detection system to enhance object detection. | 09-25-2008 |
20080253621 | BRAIN SHAPE AS A BIOMETRIC - The invention provides a method, system, and program product for identifying an individual using biometric data based on the individual's brain. In one embodiment, the invention includes constructing a biometric signature based on at least one of: features within a two-dimensional scan of the individual's brain and a difference in features between at least two two-dimensional scans of the individual's brain. | 10-16-2008 |
20080285815 | METHOD, SYSTEM, AND PROGRAM PRODUCT FOR TRANSFORMING A BIOMETRIC IMAGE - The invention provides a method, system, and program product for transforming a multi-dimensional biometric feature point set. More particularly, the invention provides a method for transforming a biometric image using surface folding of the image. In one embodiment, the invention provides a method for transforming a multi-dimensional biometric feature point set, the method comprising: converting the multi-dimensional biometric feature point set to a canonical position and orientation; applying a non-invertible transform function to each of a plurality of points of the biometric feature point set; and providing a transformed biometric feature point set comprising a plurality of transformed points. | 11-20-2008 |
20090123034 | Method, Apparatus and Computer Program Product Implementing Anonymous Biometric Matching - Method, apparatus and computer program product compare biometrics in an anonymous manner. A first collection of biometrics is transformed using a first cancelable non-invertible biometric transform to create a first collection of transformed biometrics. A second collection of biometrics is transformed using the first cancelable non-invertible biometric transform to create a second collection of transformed biometrics. The first and second collection of transformed biometrics are then compared in the transformed domain to determine if any of the transformed biometrics from the first collection match any of the transformed biometrics from the second collection. If a match is found, the parties respectively maintaining the first and second collections of biometrics exchange information confidential nature of the biometrics are maintained by the entities responsible for the collections, since the biometrics are not compared in an untransformed state. | 05-14-2009 |
20090310830 | Anonymous and Revocable Fingerprint Recognition - A biometric representation of a fingerprint from which the original biometric cannot be recovered (privacy) and which can be canceled and reissued. For example, based on an individual's token, the representation can be scrambled uniquely to the individual. From the scrambled biometric representation it is not feasible to reconstruct the biometric and if the representation is compromised, a new one is easily issued. In another aspect, if a biometric can be represented by some other one-dimensional structure, a distance or similarity measure is defined to compare biometrics. Verification decisions can be made based on the distance between or similarity of biometrics. | 12-17-2009 |
20100046805 | REGISTRATION-FREE TRANSFORMS FOR CANCELABLE IRIS BIOMETRICS - A system and method for generating a cancelable biometric includes shifting at least one pixel region in a biometric image comprised of pixel regions. The at least one pixel region is combined with at least one other pixel region to form a replacement region for the at least one pixel region to form a transformed image. The biometric image is reused to generate another transformed image if the transformed image is to be canceled. | 02-25-2010 |
20120200392 | Method, Apparatus and Computer Program Product Implementing Anonymous Biometric Matching - Method, apparatus and computer program product compare biometrics in an anonymous manner. A first collection of biometrics is transformed using a first cancelable non-invertible biometric transform to create a first collection of transformed biometrics. A second collection of biometrics is transformed using the first cancelable non-invertible biometric transform to create a second collection of transformed biometrics. The first and second collection of transformed biometrics are then compared in the transformed domain to determine if any of the transformed biometrics from the first collection match any of the transformed biometrics from the second collection. If a match is found, the parties respectively maintaining the first and second collections of biometrics exchange information concerning the individual associated with the matching biometrics. In this manner the confidential nature of the biometrics are maintained by the entities responsible for the collections, since the biometrics are not compared in an untransformed state. | 08-09-2012 |