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AAM-based object location method

A positioning method and object technology, applied in the field of image processing, can solve the problems of limiting the application scope of the algorithm, unable to detect the side face, shaking of the tracking result, etc., and achieve the effect of stable and accurate face detection and tracking

Inactive Publication Date: 2007-03-07
VIMICRO CORP
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AI Technical Summary

Problems solved by technology

[0004] However, the algorithm in the above patent application also has certain limitations
First of all, the algorithm only trains the detection model of the frontal face, and cannot detect the profile face, which means that the detection and verification of this face can only be aimed at the frontal face, which greatly limits the application range of the algorithm; secondly, the The algorithm only tracks the face through the skin color histogram, and the skin color features of the face are very susceptible to interference from other skin color areas such as the neck, hands, or similar skin color areas such as yellow clothes. It is reflected in the tracking results that the tracking area sometimes jumps to the hands and neck or yellow clothes; again, the size and position of the tracking area obtained by the original algorithm change drastically, and even if the face remains still, the tracking result will vibrate; and the algorithm cannot obtain further details of the face. Posture information, such as the rotation angle of the face, the current general posture, etc.

Method used

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Embodiment Construction

[0031] The present invention relates to a key step in another patent application "Multi-pose Face Detection and Tracking System and Method" (Patent No.: 200610113423.X) submitted by the applicant. On the basis of the tracking results, further determine the precise position, size and plane rotation angle of the detected face, so as to realize a more stable and accurate face detection and tracking algorithm, which can track faces in various poses and track any plane The rotation angle of the human face, and information such as the rotation angle and size of the tracking person can be obtained by the present invention.

[0032] In order to facilitate the understanding of the present invention, the present invention and the above-mentioned filed patent application are hereby incorporated by reference in their entirety.

[0033] Referring to FIG. 1 , a multi-pose face detection and tracking system is firstly provided, including a training module 100, a detection module 200, and a t...

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Abstract

This invention discloses one object position method based on AAM, which is based on the test and trace result to get position information and comprises the following steps: a, through object sample training to get different positions AAM modes, wherein only for object grey characteristics PCA mode to get the AAM mode composed of grey module as even value object; b, getting the current object image according to the object test and trace process to center point position, size, front frame object rotation angle; c, according to the even object to get each input object image relative to train sample affine conversion parameters; d, getting current object position information according to affine conversion parameters.

Description

technical field [0001] The invention relates to the field of image processing, in particular to an AAM-based object positioning method in the process of face detection and tracking. Background technique [0002] Human face is one of the most convenient ways of human-computer interaction in computer vision system. Face detection is to determine the position, size and other information of all faces in an image or image sequence, while face tracking is to continuously track one or more detected faces in a video sequence. Face detection and tracking technology is not only a necessary prerequisite for face recognition, expression recognition, face synthesis and other technologies, but also has a wide range of application values ​​in intelligent human-computer interaction, video conferencing, intelligent monitoring, video retrieval and other fields. [0003] The image targeted by this system is the video sequence input by the video camera. Previously, the present applicant has p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00
Inventor 黄英谢东海王浩
Owner VIMICRO CORP
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