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Method for extending three-dimensional face database

A 3D face and database technology, applied in the field of expanding face database, can solve problems such as unrealistic, insufficient coverage of 3D face database, limited data acquisition range and practicality, etc.

Inactive Publication Date: 2010-11-03
BEIJING UNIV OF TECH
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Problems solved by technology

[0003] From the above analysis, it can be seen that the coverage of the existing 3D face database is obviously insufficient, and large-scale and diverse 3D face data are collected manually Expansion is unrealistic, which greatly limits the scope and practicability of data acquisition, and is difficult to promote to practical applications

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  • Method for extending three-dimensional face database
  • Method for extending three-dimensional face database
  • Method for extending three-dimensional face database

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Embodiment Construction

[0056] Such as figure 1 Shown, the method for expanding three-dimensional human face database according to the present invention comprises the following steps:

[0057] (1) Build a 3D face database

[0058] This embodiment adopts the BJUT-3D three-dimensional human face database of Beijing University of Technology (this database is open to the outside world, anyone can obtain), the advantage of adopting the BJUT-3D three-dimensional human face database is that all data in the database have realized three-dimensional human face data One-to-one correspondence between points. Of course, it is all possible to use any other three-dimensional face database, but before using the expansion method of the present invention, the data in these databases need to be preprocessed, that is, coordinate correction is carried out to different face data, and different The 3D face data of the system is unified to the same coordinate system in order to ensure the consistency of the 3D face data. ...

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Abstract

The invention discloses a method for extending a three-dimensional face database, which comprises the following steps of: selecting M samples as an initial database from an existing three-dimensional face database; taking the initial database as an initial population of a genetic algorithm, and taking each sample in the initial database as an individual in the initial population; randomly grouping the individuals in the initial population, randomly pairing the individuals in different two groups, and randomly exchanging organs of each pair of individuals; seaming the exchanged organs and a target face; varying genic values on each pair of individual gene sites; selecting reservation or discard of new individuals according to the similarity of the newly generated individuals and the individuals in the existing population; merging the existing population and the evolved new individual population, and extending the primary three-dimensional face database; and repeating the steps till the extended face database meets the requirement. The method can realize large-scale diverse data extension, and has the advantages of simple realization, good data extending effect, high operating speed and hardware cost saving.

Description

technical field [0001] The invention relates to a method for expanding a human face database in three-dimensional human face modeling in the field of pattern recognition. Background technique [0002] Since the acquisition of 3D face data needs to rely on professional acquisition equipment and complex processing procedures, the establishment of a complete 3D face database is usually an expensive, time-consuming and laborious process. At present, the main 3D face data are: CMU's FIA database, which is a 3D database based on multi-view geometric information, including 180 people's 3D data information; 3D-RAM database, which is a 3D database based on structured light methods , use a camera and projector to obtain 3D coordinate information of people, including 3D data information of 129 people; GavabDB database, which uses Minolta VI-700 digital converter to obtain 427 3D face data with expression changes, these data are composed of 61 people composition. In 2007, Thomas S Hua...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T17/00G06N3/12
Inventor 盖赟孙艳丰尹宝才唐恒亮
Owner BEIJING UNIV OF TECH
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