Method and device for positioning mouth part of human face image as well as method and system for recognizing mouth shape

A face image and positioning method technology, applied in character and pattern recognition, computer parts, instruments, etc., can solve problems such as mouth positioning failure, color cast, interference, etc., and achieve the effect of improving accuracy

Inactive Publication Date: 2013-05-01
SHANGHAI ISVISION INTELLIGENT RECOGNITION TECH
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AI Technical Summary

Problems solved by technology

However, some input face images have color casts, which will bring greater interference to the us

Method used

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  • Method and device for positioning mouth part of human face image as well as method and system for recognizing mouth shape
  • Method and device for positioning mouth part of human face image as well as method and system for recognizing mouth shape
  • Method and device for positioning mouth part of human face image as well as method and system for recognizing mouth shape

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Embodiment Construction

[0071] The existing technology usually pre-statizes the skin color and lip color in a large number of face images, establishes a color distribution model, and then realizes the mouth positioning of the input face image based on the established color distribution model. However, when the input person When there is a color cast in the face image, it is likely to cause the failure of mouth positioning in the face image, making it difficult to effectively achieve accurate positioning of the mouth in the face image, which in turn affects the accuracy of mouth shape recognition.

[0072] For this reason, this technical solution first uses human eye positioning technology to locate the positions of both eyes in the input face image, and performs geometric correction on the face image based on the positioning result, and establishes a real-time Adaptive skin color model to obtain the skin color distribution corresponding to the image, and then extract the estimated general area of ​​th...

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Abstract

The invention discloses a method and a device for positioning a mouth part of a human face image and a method and a system for recognizing the mouth shape. The method for positioning the mouth part comprises the following steps of: detecting and positioning two eyes in an input human face image; carrying out geometric rectification on the human face image on the basis of the positioned result to form a first image; extracting a mouth part pre-estimation area from the first image to obtain a second image; establishing a skin color model of human face on the basis of the first image; projecting the second image to the skin color model so as to calculate the probability of skin color to obtain a third image; carrying out binarization processing on the third image to form a fifth image; forming an eighth image by the second image on the basis of a color tone component; carrying out assistant detection on the fifth image by the eighth image to form a ninth image; carrying out mathematical morphology operation on the ninth image to form an eleventh image; and determining the position of a mouth part area in the input human face image by a horizontal projection and a vertical projection on the basis of the eleventh image. According to the technical scheme, accurate positioning of the mouth part can be effectively realized.

Description

technical field [0001] The invention relates to the field of image processing and pattern recognition, in particular to a method and device for locating a mouth in a face image, a method and a system for recognizing a mouth shape. Background technique [0002] With the increasing demand for modern intelligent technology in society, the detection of the state of the face and mouth is becoming an emerging research topic of great significance. [0003] For example: in the field of traffic safety monitoring, which is closely related to life, if real-time intelligent monitoring of the driver's driving can be realized, and the fatigue situation of yawning and yawning can be reminded in time during the monitoring, the traffic accident rate will be significantly reduced; in facial expression recognition In the field of technology, the contour shape of the mouth will be an important feature for expression classification; in the field of lip language assisted recognition technology fo...

Claims

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Application Information

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IPC IPC(8): G06K9/00
Inventor 王晓平曾文斌赵文忠
Owner SHANGHAI ISVISION INTELLIGENT RECOGNITION TECH
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