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Methods and devices for light source direction calibration and human information three-dimensional collection

A technology of light source direction and calibration device, which is applied in the field of three-dimensional collection of human body information, can solve the problems of high hardware cost, large volume, and unfavorable integration, and achieve high-precision reconstruction, simple system structure, and low-cost effects

Active Publication Date: 2013-01-02
SHENZHEN INST OF ADVANCED TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the existing three-dimensional collection and recognition technology of human body information mainly adopts optical three-dimensional scanning means to quickly obtain the three-dimensional model of the fingerprint. High cost; 2) Large volume, not conducive to integration

Method used

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  • Methods and devices for light source direction calibration and human information three-dimensional collection
  • Methods and devices for light source direction calibration and human information three-dimensional collection
  • Methods and devices for light source direction calibration and human information three-dimensional collection

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Embodiment Construction

[0043] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0044] figure 1 Shown is a schematic diagram of the light source direction calibration device according to the present invention. The light source direction calibration device includes: a specular reflection ball 11 whose radius r is known; a light source 12 for illuminating the specular reflection ball 11 from the side; and the light spot of the light source 12 on the specular reflection ball 11; the calculation unit 14 is connected with the camera unit 13 and is used for calculating the direction of the light source 12.

[0045] figure 2Shown is a schematic diagram of the light source direction calibration method according to the present invention. On the premise that the internal parameters of the camera unit 13 and the radius r of the specular reflection sphere 11 are known, the direction of the light source can be calculated ...

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Abstract

The invention relates to a device and a method for assisting light source direction calibration by using a mirror surface reflection sphere, and further relates to a device and a method for human information three-dimensional collection. An ordinary camera and a plurality of light-emitting diode (LED) lights are used, so that three-dimensional collection of human information can be rapidly completed; and light source direction calibration and low light source illumination field rectification are used to achieve high-accuracy three-dimensional reconstruction of human information. The methods and the devices have the advantages of being low in cost, convenient to carry, rapid and high in accuracy.

Description

【Technical field】 [0001] The invention relates to a technology for three-dimensional collection of human body information, in particular to a non-contact three-dimensional collection method and device for human body information. 【Background technique】 [0002] Human body information identification technology, especially fingerprint identification technology has been widely used, such as fingerprint locks, fingerprint safes, fingerprint attendance machines, fingerprint mobile phones, etc., are widely used in public security, insurance, banking and other industries, bringing modern life Here comes great security and convenience. Most of the existing human body information recognition is based on the principle of two-dimensional image collection and analysis and recognition. The problems brought about by this contact image collection method are also obvious: 1) The deformation of the fingerprint due to contact will affect the recognition rate; 2. ) Problems such as oil polluti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/00G06K9/00G06K9/20
Inventor 宋展谢伍媛庞旭芳
Owner SHENZHEN INST OF ADVANCED TECH