Chin detecting method, chin detecting system and chin detecting program for a chin of a human face

Abstract

A chin detecting method is provided. After detecting a human face and setting a chin detecting window at a lower part of the image, an edge strength distribution is calculated within the chin detecting window and pixels having an edge strength with a threshold value or more are detected based on the edge strength distribution. Then an approximated curve is obtained to most match a distribution of each of the detected pixels and a lowermost part of the approximated curve is identified as the lower base of the chin of the human face. Thereby the chin lower base of the human face can be detected automatically, accurately and quickly.

Description

RELATED APPLICATIONS [0001] This application claims priority to Japanese Patent Application No. 2003-407911 filed Dec. 5, 2003 which is hereby expressly incorporated by reference herein in its entirety. BACKGROUND [0002] 1. Technical Field [0003] The present invention concerns pattern recognition and object recognition technologies, and more specifically, the invention relates to a chin detecting method, a chin detecting system and a chin detecting program for accurately detecting the location of the chin of a human face from an image of the human face. [0004] 2. Related Art [0005] With recent advancements in pattern recognition technologies and information processors such as computers, the recognition accuracy of text and sound has been dramatically improved. However, in the pattern recognition of an image of a human, an object, the landscape and so on, e.g., an image scanned from a digital still camera and the like, it is still difficult to accurately and quickly identify whether ...

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