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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 11704912 B1

PDFFull Text
Date of Patent:
Jul. 18, 2023

Filed:

Jun. 16, 2020

Label-free performance evaluator for traffic light classifier system

Applicant:

Ford Global Technologies, Llc, Dearborn, MI (US);

Inventors:

Guy Hotson, Mountain View, CA (US);

Richard L. Kwant, San Bruno, CA (US);

Brett Browning, Pittsburgh, PA (US);

Deva Ramanan, Pittsburgh, PA (US);

Assignee:

Ford Global Technologies, LLC, Dearborn, MI (US);

Attorneys:

Frank MacKenzie

Brooks Kushman P.C.

Primary Examiner:

Anne Marie Antonucci

Assistant Examiner:

Patrick M Brady

Int. Cl.
CPC ...
B60W 40/04 (2006.01); B60W 60/00 (2020.01); G06F 18/22 (2023.01); G06F 18/214 (2023.01); G06F 18/2431 (2023.01); H04N 23/90 (2023.01); G06V 20/58 (2022.01); G06V 10/764 (2022.01); G06V 10/774 (2022.01); G06V 10/776 (2022.01); G06V 10/82 (2022.01); G06F 18/21 (2023.01);
U.S. Cl.
CPC ...
G06V 20/584 (2022.01); B60W 40/04 (2013.01); B60W 60/0015 (2020.02); B60W 60/0025 (2020.02); B60W 60/0027 (2020.02); G06F 18/214 (2023.01); G06F 18/217 (2023.01); G06F 18/22 (2023.01); G06F 18/2431 (2023.01); G06V 10/764 (2022.01); G06V 10/776 (2022.01); G06V 10/7753 (2022.01); G06V 10/82 (2022.01); H04N 23/90 (2023.01); B60W 2420/42 (2013.01); B60W 2555/60 (2020.02);
Abstract

A method is disclosed for evaluating a classifier used to determine a traffic light signal state in images. The method includes, by a computer vision system of a vehicle, receiving at least one image of a traffic signal device of an imminent intersection. The traffic signal device includes a traffic signal face including one or more traffic signal elements. The method includes classifying, by a traffic light classifier (TLC), a classification state of the traffic signal face using labeled images correlated to the received at least one image. The classification state controls an operation of the vehicle at the intersection. The method includes evaluating a performance of the classifying of the classification state generated by the TLC. The evaluation is a label-free performance evaluation based on unlabeled images. The method includes training the TLC based on the evaluated performance.

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