Patent application number | Description | Published |
20080246917 | Common face and iris imaging optics - A duplex camera with common face and iris imaging optics locates an iris in a scene and images the iris without requiring multiple camera alignment or a rapid zoom capability. A wavelength selective mirror separates the light from an imaged scene into visible and infrared components. The visible component supplies a face image in which an iris location can be determined. Visible light optics and a visible light sensor array provide a scene image to an image processor that determines the iris location. Infrared optics and an infrared sensor produce an iris image centered on the iris location. Upon determining an iris location, a motorized stage can position the iris image in the infrared sensor. The common face and imaging optics allow the image sensors to be permanently aligned to one another. | 10-09-2008 |
20080247606 | Agile illumination for biometric authentication - An agile illumination apparatus for use in biometric authentication is disclosed. A controlled spot flash strobe forms and focuses a narrow illuminating beam so as to cover an area of interest for a biometric authentication of a target with a spot of light of constant size regardless of a distance of the target from the controlled spot flash strobe. A positioner can then be utilized to steer the narrow illuminating beam to a target in a monitored space. The spot size is kept constant and its irradiance distribution is kept uniform in order to deliver a constant amount of energy to the target irrespective of the distance, wherein the controlled spot flash strobe automatically reduces its power as the target moves closer to the controlled spot flash strobe in order to maintain a constant exposure value and provide for enhanced biometric authentication of the target. | 10-09-2008 |
20080277601 | Eye-safe near infra-red imaging illumination method and system - A method and system for eye-safe near infra-red (NIR) optical imaging illumination. An eye of an intended subject are imaged with visible light or NIR light at an unconditionally eye-safe illumination level and the maximum permissible eye-safe NIR illumination that can be applied to the eye is determined from the captured images. The eye of the intended subject can then be illuminated with at least one substantially maximal NIR light pulse having a pulse intensity and duration selected to provide the substantially maximum permissible eye-safe NIR illumination intensity at the eye. NIR light pulse illumination can be inhibited in response to detection of other subjects either within the vicinity of a volume extending between an NIR illuminator illuminating the eye and the intended subject. The likelihood that an intended subject has been recently illuminated can also be determined and statistical measures can be used to avoid re-illuminating subject unnecessarily. | 11-13-2008 |
20100020157 | OPTICAL FINGERPRINT ACQUISITION - A swept distance between a subject and a plurality of cameras provides a plurality of raw images. Focused portions of the raw images are fused to generate a synthetic image and a distance image. A projection of the synthetic image and the distance image yields a panoramic image. | 01-28-2010 |
20100033677 | IMAGE ACQUISITION SYSTEM - A system having a sensor and variable focus lens for iris image standoff acquisition. The sensor may capture a sequence of images at a high frame rate of a person for getting an eye or an iris in a window within the images. Even if the eye moves around in the image, the window may stay on the eye. During this capture, the focus of the lens may be changed, with a best focus situated somewhere in between the end focus positions of the lens. The sensor may be an infrared (IR) sensor and an IR illuminator or flash may provide light for the capture of images. An intensity variance indicator may be incorporated to select an in-focus image of the sequence. Processing of the images may be subsequent to the capture of images, thus not hindering the frame rate of the system. | 02-11-2010 |
20100034529 | PREDICTIVE AUTOFOCUSING SYSTEM - A system for providing a predictive autofocus prior to capturing an image of an iris of a subject. A sequence of images of the subject may be taken with a visible light sensitive camera. A speed and/or location of the subject may be estimated from the images. An encounter may be when the subject is within focus of the camera or, in other words, a focus distance and subject distance coincide. The focus may be determined in accordance with an intensity variance determination of the subject in the image, and more particularly of a subject's eye within a window of an image. Upon an encounter, an image of the iris of the eye may be captured with an infrared sensitive camera. | 02-11-2010 |
20100220896 | METHOD AND SYSTEM FOR DETERMINING SHUTTER FLUTTERING SEQUENCE - A method, system and computer-usable medium for determining shutter fluttering sequence. The disclosed approach is based on the use of shutter flutter technology, which means that an image can be acquired in such a manner as to encode all information about the moving subject. The disclosed approach involves determining a shutter's fluttering pattern that optimally encodes information at all frequencies. The disclosed approach involves an optimization method for finding a shutter fluttering pattern that has several desired properties. These properties can be expressed in the context of a fitness function: given a fluttering pattern and the target subject's velocity, it produces the equivalent Modulation Transfer Function (MTF), measures three attributes, and produces a fitness score. These attributes are the minimum contrast, the variance in contrast across spatial frequencies, and the mean contrast. The objective of the disclosed approach is to determine the fluttering pattern that maximizes the fitness score. | 09-02-2010 |
20100220898 | FEATURE-BASED METHOD AND SYSTEM FOR BLUR ESTIMATION IN EYE IMAGES - A feature-based method and system for blur estimation in eye images. A blur estimation can be performed from eye/iris images in order to produce de-blurred images that are more useful for biometric identification. The eye/iris region, in particular the edge between the iris and pupil regions, can be utilized. The pattern of shutter motion or a characterization of the optical system can be utilized. By capturing a burst of images, or a video stream, one can use eye position in the images before and after a given capture to predict the motion of the eye within that capture. Because the before/after image frames need only contain the information necessary to locate the eye, and need not contain sufficient information to perform matching, the capture of these images can be accomplished with a wider range of settings. | 09-02-2010 |
20110050894 | SYSTEM AND METHOD OF TARGET BASED SMOKE DETECTION - A smoke detector includes processing circuitry coupled to a camera. The field of view of the camera contains one or more targets, each having spatial indicia thereon. The processing circuitry collects a sequence of spatial frequency measures, such as contrast indicating parameters. Members of the sequence can be compared to at least one reference spatial frequency measure to establish the presence of smoke between the target and the camera. | 03-03-2011 |
20110187880 | IMAGE ACQUISITION SYSTEM USING ORTHOGONAL TRANSFER CCD SENSING ELEMENT - An image acquisition system that includes a first image recording device that records a series of images of a subject. A lateral velocity vector estimator receives the series of images from the first image recording device and estimates the lateral velocity vectors of the subject relative to the image acquisition system. The image acquisition system further includes a second image recording device that includes an orthogonal transfer CCD sensing element which records a target image of the subject. The orthogonal transfer CCD sensing element includes an array of pixels. A control adjusts the array of pixels within the orthogonal transfer CCD sensing element based on the lateral velocity vector estimates provided by the lateral velocity estimator. | 08-04-2011 |
20110216211 | METHOD AND SYSTEM FOR DESIGNING OPTIMAL FLUTTER SHUTTER SEQUENCE - A method, system and computer-usable medium for determining an optimal shutter fluttering sequence. The disclosed approach is based on the use of shutter flutter technology, which means that an image can be acquired in such a manner as to encode all information about the moving subject. The disclosed approach involves determining a shutter's fluttering pattern that optimally encodes information at all frequencies. The disclosed approach involves an optimization method for finding a shutter fluttering pattern that maximizes the minimum value of a function defining the plurality of flutter shutter sequences over a frequency domain. The disclosed approach involves eliminating all flutter shutter sequences that contain lost frequencies. The objective of the disclosed approach is to select an optimal flutter shutter sequence for implementation with a flutter shutter camera. | 09-08-2011 |
20110298912 | WAVEFRONT SENSING FOR BIOMETRIC IMAGING - Devices and approaches for addressing wavefront corruption in biometric applications. A biometric imaging system may have a laser, a wavefront sensor, and an optical system. The laser may be configured to project a laser spot onto a skin portion of a human face, and the optical system may be configured to collect scattered light from the laser spot and relay the light to the wavefront sensor. The biometric imaging system may also have an adaptive optical element and a controller configured to provide actuation commands to the adaptive optical element based at least in part upon a wavefront distortion measurement output from the wavefront sensor. The optical system may further be configured to relay image light to an image camera of the optical system. The image camera may be an iris camera configured for obtaining iris images suitable for biometric identification. | 12-08-2011 |
20110304721 | METHOD AND SYSTEM FOR IRIS IMAGE CAPTURE - According to one example embodiment, a process and system include a camera used to capture a sequence of illuminated images of an subject, wherein the images are stored in frames. The focus point is changed for each image captured so that the focus point sweeps from a far to a near end of a sweep range, in discrete steps or continuous motion, so that successive images have slightly overlapping depths of field. The sweep range and overlapping depths of field provide that at least one image is well focused on the iris of the eye of the subject. In one other example embodiment, one or more of the images are illumined with a illumination fired for a respective captured image. In another embodiment, the sweep range is determined at least in part using a range finder or is otherwise controlled to determine a position of the subject so that the sweep range starts and stops a desired distance in front of and behind the subject, respectively. | 12-15-2011 |
20120033096 | MOTION BLUR MODELING FOR IMAGE FORMATION - The present disclosure includes motion blur modeling methods and systems for image formation. One motion blur modeling method for image formation includes obtaining image data utilized to form a particular image taken by a camera of a subject, obtaining velocity vector data for the subject at the time the image was taken, defining a convolution kernel for use formation of the particular image and based upon the velocity vector data, and applying the convolution kernel to the image data to produce a de-blurred set of image data utilized to form the particular image. | 02-09-2012 |
20120224088 | FLASHLESS MOTION INVARIANT IMAGE ACQUISITION SYSTEM - A flashless image acquisition system that includes a tandem imaging device having a tandem field of view and comprising a velocity vector estimate imaging device coupled to an object imaging device; and a peripheral imaging device having a peripheral field of view wider than the tandem field of view and configured to acquire real-time information related to positions of a moving object, wherein the real-time information is provided to the tandem imaging device, further wherein the velocity vector estimate imaging device is configured to provide in-exposure velocity vector estimates to control the object imaging device is described. | 09-06-2012 |
20130099001 | MATRIX CODE SCANNER WITH ORTHOGONAL TRANSFER CHARGE-COUPLED DEVICE - A hand held matrix code scanner includes an orthogonal transfer charge-coupled device (OTCCD), a controller coupled to the OTCCD, and a sensor coupled to the controller. The sensor senses movement of the scanner The controller is configured to move a first location of the OTCCD array to a second location as a function of data from the sensor to compensate for the device motion during image exposure. | 04-25-2013 |
20130101155 | CONTROLLER FOR AN IMAGE STABILIZING ORTHOGONAL TRANSFER CHARGE-COUPLED DEVICE - An apparatus includes a video sensing device, a velocity vector estimator (VVE) coupled to the video sensing device, a controller coupled to the velocity vector estimator, and an orthogonal transfer charge-coupled device (OTCCD) coupled to the controller. The video sensing device transmits a plurality of image frames to the velocity vector estimator. The controller receives a location of an object in a current frame, stores locations of the object in one or more previous frames, predicts a motion trajectory and the predicted location of the object on it in a subsequent frame as a function of the locations of the object in the current frame and the one or more previous frames, and transmits the predicted location of the object to the OTCCD. The OTCCD shifts its image array of pixels as a function of the predicted location of the object. | 04-25-2013 |
20130308001 | IMAGE STABILIZATION DEVICES, METHODS, AND SYSTEMS - Image stabilization devices, methods, and systems are described herein. One image stabilization device includes a sensor having an array of pixels, wherein the sensor is configured to track a moving object using a number of the pixels, wherein the number of the pixels track only a particular portion of the moving object, and form an image of the moving object using the number of the pixels and their neighboring pixels that were not used to track the moving object. | 11-21-2013 |
20140023240 | IRIS RECOGNITION USING LOCALIZED ZERNIKE MOMENTS - A system receives an iris image and segments the iris region. The segmented iris region is mapped to a unit disk and partitioned into local iris regions (or sectors) as a function of the radius and angle The system calculates localized Zernike moments for a plurality of regions of the unit disk. The localized Zernike moment includes a projection of the local iris region into a space of Zernike polynomial orthogonal basis functions. The system generates an iris feature set from the localized Zernike moments for each partitioned region, excluding the regions which are comprised by occlusion. The iris features are weighted based on the conditions of blur, gaze and occlusion of the iris region. A probe iris image is then matched to a plurality of iris images in a database based on the distance of its feature set to the corresponding plurality of iris feature sets. | 01-23-2014 |
20150066903 | SECURITY SYSTEM OPERATOR EFFICIENCY - Systems and methods for increasing an efficiency of an operator of a security system are discussed generally herein. A system can include a memory including ontology data saved thereon, the ontology data can define interrelationships between a scanner associated with access to a room of an area under surveillance, a camera with a field of view at least partially overlapping a footprint of the room, an identifier configured to be scanned by the scanner and associated with a person, and a security policy including one or more predefined conditions, which when satisfied, indicate when a security threat exists, the security policy includes a response an operator can perform if the conditions are satisfied, and the system can include a query module configured to receive a query and search the ontology data and temporal and spatial data associated with the area under surveillance in response to receiving the query. | 03-05-2015 |