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Matched Legal Cases: ['Application No. 60', 'Application No. 60', 'Application No. 60', 'Application No. 60', 'Application No. 60', 'Application No. 200480038037', 'Application No. 200480038037', 'Application No. 200480038037', 'Application No. 200680037455', 'Application No. 200810131277', 'Application No. 200810131277', 'Application No. 04812670', 'Application No. 06851443']

Patent US7944467 - Task-based imaging systems - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inAdvanced Patent SearchPatentsA task-based imaging system for obtaining data regarding a scene for use in a task includes an image data capturing arrangement for (a) imaging a wavefront of electromagnetic energy from the scene to an intermediate image over a range of spatial frequencies, (b) modifying phase of the wavefront, (c)...http://www.google.com/patents/US7944467?utm_source=gb-gplus-sharePatent US7944467 - Task-based imaging systemsAdvanced Patent SearchPublication numberUS7944467 B2Publication typeGrantApplication numberUS 11/524,142Publication dateMay 17, 2011Filing dateSep 19, 2006Priority dateDec 1, 2003Fee statusPaidAlso published asUS8760516, US20100278390, US20110176708Publication number11524142, 524142, US 7944467 B2, US 7944467B2, US-B2-7944467, US7944467 B2, US7944467B2InventorsPaulo E. X. Silveira, Ramkumar Narayanswamy, Robert H. Cormack, Gregory E. Johnson, Edward R. Dowski, Jr.Original AssigneeOmnivision Technologies, Inc.Export CitationBiBTeX, EndNote, RefManPatent Citations (93), Non-Patent Citations (69), Referenced by (4), Classifications (9), Legal Events (4) External Links: USPTO, USPTO Assignment, EspacenetTask-based imaging systems
US 7944467 B2Abstract
This application claims the benefit of priority to U.S. Provisional Patent Application No. 60/718,522, filed 19 Sep. 2005 and entitled �Iris Recognition at a Large Standoff Distance,� and U.S. Provisional Patent Application No. 60/779,712, filed 6 Mar. 2006 and entitled �Zoom Lens Systems with Wavefront Coding.� This application is also a continuation-in-part of commonly-owned and copending U.S. patent application Ser. No. 11/225,753 entitled �Iris Image Capture Devices and Associated Systems� and filed 13 Sep. 2005 now U.S. Pat. No. 7,652,685, which claims priority to U.S. Provisional Patent Application No. 60/609,445, filed 13 Sep. 2004 and entitled �Iris Recognition Security for Camera Phones, Digital Cameras and Personal Digital Assistants.� This application is also a continuation-in-part of U.S. patent application Ser. No. 11/000,819, filed 1 Dec. 2004 now U.S. Pat. No. 7,469,202 and entitled �System and Method for Optimizing Optical and Digital System Designs,� which claims priority to U.S. Provisional Patent Application No. 60/526,216, filed on 1 Dec. 2003 and entitled �Designing Optical Imaging Systems with Wavefront Coding Elements.� Each of the aforementioned patent applications is expressly incorporated herein by reference in its entirety.
One goal of a task-based imaging system may be to provide task-specific information or image data for one or more signal-processing tasks. Such tasks may include biometric iris recognition, biometric face recognition, biometric recognition for access control, biometric recognition for threat identification, barcode reading, imaging for quality control in an assembly line, optical character recognition, biological imaging, automotive imaging for object detection and fiducial mark recognition for registration of objects during automated assembly. The above-mentioned biometric recognition tasks, for instance, may be executed by task-based imaging systems for security or access purposes. As an example, biometric iris recognition can provide human identification with very high accuracy when optical and digital portions of such a task-based imaging system provide image data that is detailed enough and has a high enough signal-to-noise ratio (�SNR�).
Wavefront coding (�WFC�) enables high quality imaging over a range of optical aberrations including defocus; for example, WFC may enable an imaging system to provide an image that is in focus over a wide range of standoff distances. One combination of WFC and biometric iris recognition at short distances between a handheld device and an iris is disclosed in U.S. Provisional Patent Application No. 60/609,445 and U.S. patent application Ser. No. 11/225,753.
An exemplary �IHONS 1.1� design used in examples of FIG. 17 through FIG. 41 utilizes specific αij coefficients in the IHONS design defined in Eq. 1. The αij terms are defined as follows. The first four terms correspond to separable terms:
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