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Three-dimensional face polarization illumination and information acquisition system and method thereof

A technology of information collection and three-dimensional face, which is applied in the field of face collection, can solve the problems of image quality, ambient light, interference, etc. at the same time, and achieve the effect of eliminating glare, improving quality, and eliminating image quality degradation and instability

Active Publication Date: 2020-01-31
WISESOFT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the problem that image quality and ambient light interference cannot be solved at the same time in the prior art, to provide a three-dimensional face polarization illumination and information collection system and its method, to optimize the light source signal through modulation and to adjust the installation of the analyzer way to achieve the purpose of eliminating the interference of ambient light and ensuring the stability and reliability of image quality

Method used

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  • Three-dimensional face polarization illumination and information acquisition system and method thereof
  • Three-dimensional face polarization illumination and information acquisition system and method thereof
  • Three-dimensional face polarization illumination and information acquisition system and method thereof

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Embodiment 1

[0043] Such as image 3 As shown, a three-dimensional human face polarized illumination and information collection system includes a polarized light source, A collection camera 5, B collection camera 6, C collection camera 7, D collection camera 8, E collection camera 9, and each collection camera lens The front analyzer 10.

[0044] The polarized light source adopts arc-surface illumination, and takes the longitudinal nose bridge of the center line of the target face 1 as the dividing edge collected by the left and right cameras. Polarized light with a wide angle can make the level and details of the object plane be collected as much as possible. The polarized light source is composed of a light source plate 2 , a uniform light diffusion plate 3 and a polarizer 4 . The light source board 2 provides illumination, and the outgoing light of the light source board 2 becomes surface light parallel to the curved surface after being processed by the uniform light diffusion plate 3...

Embodiment 2

[0046] The difference between this embodiment and Embodiment 1 is that the device also includes a control terminal, and the analyzer in front of each acquisition camera lens also includes a micro-motor, and the control terminal is used to control the micro-motor working state and receive the image information collected by the acquisition camera, the analyzer is driven by a micro-motor and can rotate at a uniform speed around the center of the optical axis of the acquisition camera (its rotational speed ω is adjustable, and the polarization angle is controlled by the micro-motor driven by The control terminal can receive the driving parameters of the micro-motor), and take continuous shots so that the collected images form a series of correlation photos with target polarization information, and its illuminance meets I=Io(cosθ)^2 (θ is the polarizer and Angle between the polarization directions of the analyzer.), and it is a homogeneous image with continuous grayscale changes b...

Embodiment 3

[0048] Such as Figure 4 As shown, the difference between this embodiment and Embodiment 1 is that a grating projector 11 is provided on the left and right sides of the polarized light source, and the grating projector 11 can project a sinusoidal grating containing phase information, which can be used to calculate the The spatial depth of the face.

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Abstract

The invention relates to a three-dimensional face polarization illumination and information acquisition system and a method thereof. The polarization degree of the electric vector of the light sourcesignal is spatially modulated, that is to say, vector coding with higher fineness is performed on the transmitted signal, so that the purposes of eliminating the interference of ambient light and ensuring the stability and reliability of image quality are achieved, and the problem that the image quality and the ambient light interference cannot be solved simultaneously in the prior art is solved.

Description

technical field [0001] The invention relates to a face collection technology, in particular to a three-dimensional face polarization illumination and information collection system and method thereof. Background technique [0002] In image acquisition, in order to reflect the real information of the object as much as possible, it is necessary to adopt a reasonable lighting method. Most of the existing imaging technologies only detect the intensity of a certain light band, and the following two methods are usually used for acquisition: 1. Light The method of emphasizing modulation and uniform lighting, that is, using uniform light plates and other devices to make the illuminance more uniform; 2. Using the method of optical filters, that is, only imaging the reflected light of objects in the target light band, which can avoid the environment outside a certain passband Light. [0003] However, in these two existing technologies, the first method of light intensity modulation an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/20G06K9/00
CPCG06V40/161G06V10/141G06V10/147
Inventor 吕坤荆海龙刘兴旺杨梦龙
Owner WISESOFT CO LTD
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