EP1589485A3

Object tracking and eye state identification method

Abstract

An object tracking method tracks a target object between successively generated infrared video images using a grey-scale hat filter to extract the target object from the background (50). The filtered image is binarized (62), and candidate binary blobs are extracted (66). The binary blob that minimizes the Euclidian spatial distance to the previous position of the object and satisfies a specified appearance model is selected (72, 78, 80), and its center of mass is taken as the current position of the object (88). Where the object is a person's eye, the eye state and decision confidence are determined (114) by analyzing the shape (108) and appearance (102) of the binary blob along with changes in its size (92) and the previous eye state, and applying corresponding parameters to an eye state decision matrix (114).

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Citations
Document	Relation	Office	Cited during
US5859921A	Cites	United States of America	Search report
US6571002B1	Cites	United States of America	Search report
US6606397B1	Cites	United States of America	Search report
WO9926126A1	Cites	World Intellectual Property Organization (WIPO)	Search report
RU-SHANG WANG ET AL: "Facial feature extraction and tracking in video sequences", MULTIMEDIA SIGNAL PROCESSING, 1997., IEEE FIRST WORKSHOP ON PRINCETON, NJ, USA 23-25 JUNE 1997, NEW YORK, NY, USA,IEEE, US, 23 June 1997 (1997-06-23), pages 233 - 238, XP010233829, ISBN: 978-0-7803-3780-0, DOI: 10.1109/MMSP.1997.602641	Non-patent	–	Search report
PARDAS M: "Extraction and tracking of the eyelids", ACOUSTICS, SPEECH, AND SIGNAL PROCESSING, 2000. ICASSP '00. PROCEEDING S. 2000 IEEE INTERNATIONAL CONFERENCE ON 5-9 JUNE 2000, PISCATAWAY, NJ, USA,IEEE, vol. 6, 5 June 2000 (2000-06-05), pages 2357 - 2360, XP010504777, ISBN: 978-0-7803-6293-2	Non-patent	–	Search report
GEE ET AL: "Non-intrusive gaze tracking for human-computer interaction", PROC. OF MECHATRONICS AND MACHINE VISION IN PRACTICE,, 1 January 1994 (1994-01-01), pages 112 - 117, XP009161764	Non-patent	–	Search report
MARAGOS: "Tutorial on Advances in Morphological Image Processing and Analysis", OPTICAL ENGINEERING, SOC. OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS, BELLINGHAM, vol. 26, 1 July 1987 (1987-07-01), pages 623 - 632, XP009161773, ISSN: 0091-3286	Non-patent	–	Search report

5 members in 2 offices; this record represents the family

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Document	Office	Kind	Date
828005	United States of America	–	2004-04-20
82800504	United States of America	A	2004-04-20

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Document	Office	Kind
US2005232461A1	United States of America	A1	2005-10-20
EP1589485A2	European Patent Office (EPO)	A2	2005-10-26
US7362885B2	United States of America	B2	2008-04-22
EP1589485A3This record	European Patent Office (EPO)	A3	2012-09-12
EP1589485B1	European Patent Office (EPO)	B1	2016-06-29

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2025-04-30	Change of applicant/patenteeR081	R081	DE
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2023-06-14	Opt-out of the competence of the unified patent court (upc) registeredP01	P01	EP
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2017-12-27	Gb: european patent ceased through non-payment of renewal feeCeasedGBPC	GBPC	EP
2017-11-30	Patent ceasedCeasedPL	PL	CH
2017-08-31	Lapsed in a contracting state [announced via postgrant information from national office to epo]LapsedPG25	PG25	EP
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2016-08-11	Dpma publication of mentioned ep patent grantGrantedR096	R096	DE
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2005-09-09	Public reference made under article 153(3) epc to a published international application that has entered the european phaseORIGINAL CODE: 0009012PUAI	PUAI	EP

Object tracking and eye state identification method

Abstract

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