U.S. patents available from 1976 to present.
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Method for locating a subject's lips in a facial image

Patent 5805745 Issued on September 8, 1998. Estimated Expiration Date: Icon_subject June 26, 2015. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

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Inventor

Application

No. 494900 filed on 06/26/1995

US Classes:

382/291, Determining the position of an object348/14.07, Display arrangement (e.g., multiscreen display)382/118, Using a facial characteristic382/156, Neural networks382/170, With pattern recognition or classification382/195, Local or regional features382/205, Local neighborhood operations (e.g., 3x3 kernel, window, or matrix operator)382/224, Classification382/260, Image filter382/279, Convolution382/282, Selecting a portion of an image382/286, Measuring image properties (e.g., length, width, or area)382/308Morphological operations (i.e., local neighborhood operations)

Examiners

Primary: Shalwala, Bipin

Attorney, Agent or Firm

International Classes

G06K 009/36
G06K 009/00
G06K 009/62
G06K 009/56
170
291

Abstract

An embodiment of the present invention locates facial features in an image by bandpass filtering the image and then performing morphological operations followed by a thresholding operation. This initial processing identifies candidate areas where facial features may be located. The candidate areas are evaluated by classifiers to determine if a facial feature, such as an eye or mouth, has been located.

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