APPARATUS FOR MEASURING LIGHT REFLECTIONS OF AN OBJECT AND USE THEREOF

    公开(公告)号:EP1495308B1

    公开(公告)日:2018-08-29

    申请号:EP03746248.8

    申请日:2003-04-02

    CPC classification number: G01N21/4738 G01N21/55

    Abstract: A method and apparatus for measuring light reflections of an object, comprising a light-source illumination-observation assembly, the assembly comprising: (A) an illumination unit comprising an illumination light source and illumination aperture stop being arranged to provide a confined luminous field, an illumination field stop ( 307 ) adapted to provide an illumination beam ( 305 ) of light from said confined luminous field, an collimating optical element ( 309 ) adapted to collimate said illumination beam and to provide an illumination field ( 313 ) on an object; (B) an observation unit comprising: at least one observation field stop adapted to provide an observation beam ( 306 ) comprising a ray boundary, at least one focusing optical element ( 309 ) adapted to focus said observation beam, an observation light receiver; and (C) at least one common optical element ( 309 ) arranged so that said illumination beam and said observation beam form an overlap therein; and (D) a unit separation stop ( 310 ) adapted to stop light from said illumination unit in reaching said observation light receiver of said observation unit; wherein said at least one observation field stops ( 308, 310, 311 ) comprises at least one limiting field stop ( 310 ) adapted to limit said ray boundary of said observation beam and to maintain said overlap of said illumination beam and said observation beam; a diffuser light-source assembly; and use thereof.

    METHOD AND APPARATUS FOR ESTIMATING REFLECTANCE PARAMETERS AND A POSITION OF A LIGHT SOURCE IN A SCENE

    公开(公告)号:EP3144893B1

    公开(公告)日:2018-06-06

    申请号:EP16187378.1

    申请日:2016-09-06

    Abstract: A method and apparatus for estimating reflectance parameters and a position of the light source(s) of specular reflections of a scene include RGB sequence analysis with measured geometry in order to estimate specular reflectance parameters of an observed 3D scene. Embodiments include pixel-based image registration from which profiles of 3D scene points image intensities over the sequence are estimated. Profiles are attached to a 3D point and to the set of pixels that display its intensity in the registered sequence. Subsequently, distinction is made between variable profiles that reveal specular effects and constant profiles that show diffuse reflections only. Then, for each variable profile diffuse reflectance is estimated and subtracted from the intensity profile to deduce the specular profile and the specular parameters are estimated for each observed 3D point. Then, the location of at least one light source responsible for the specular effects is estimated. Optionally, the parameters can be iteratively refined to determine color information and specular reflectance parameters.

    APPARATUS AND METHOD FOR ANALYSING A SURFACE
    10.
    发明公开
    APPARATUS AND METHOD FOR ANALYSING A SURFACE 审中-公开
    用于分析表面的装置和方法

    公开(公告)号:EP3237887A1

    公开(公告)日:2017-11-01

    申请号:EP15820579.9

    申请日:2015-12-21

    Abstract: Apparatus for analysing a surface which, in use, is subject to drag, the apparatus comprising, a light source for generating light of at least one predetermined wavelength, a light source holder for holding and positioning the light source so as to direct it at the surface, a light detector for detecting reflected light from the surface and generating a signal in response thereto, a light detector holder for holding the light detector and positioning it so as to detect the reflected light, and a connector for connecting the light detector to a microprocessor to analyse the signal. Also disclosed is a method of analysing a surface which, in use, is subject to drag.

    Abstract translation: 一种用于分析在使用中经受拖曳的表面的设备,该设备包括:用于产生至少一个预定波长的光的光源,用于保持和定位光源以便将光源引导到 光检测器,用于检测来自表面的反射光并响应于此产生信号;光检测器支架,用于保持光检测器并对其进行定位以检测反射光;以及连接器,用于将光检测器连接到 微处理器来分析信号。 还公开了分析在使用中经受拖拽的表面的方法。

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