KR970060972A - Reconstruction Method of Hybrid Reflective Surface Using Indirect Diffusion Lighting - Google Patents

Reconstruction Method of Hybrid Reflective Surface Using Indirect Diffusion Lighting Download PDF

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Publication number
KR970060972A
KR970060972A KR1019960000317A KR19960000317A KR970060972A KR 970060972 A KR970060972 A KR 970060972A KR 1019960000317 A KR1019960000317 A KR 1019960000317A KR 19960000317 A KR19960000317 A KR 19960000317A KR 970060972 A KR970060972 A KR 970060972A
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South Korea
Prior art keywords
reflection
reflection surface
dimensional
hybrid
indirect
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KR1019960000317A
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Korean (ko)
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KR100210654B1 (en
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최종수
김태윤
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최종수
김태윤
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Priority to KR1019960000317A priority Critical patent/KR100210654B1/en
Publication of KR970060972A publication Critical patent/KR970060972A/en
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Publication of KR100210654B1 publication Critical patent/KR100210654B1/en

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T15/00—3D [Three Dimensional] image rendering
    • G06T15/50—Lighting effects
    • G06T15/80—Shading
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T17/00—Three dimensional [3D] modelling, e.g. data description of 3D objects
    • G06T17/20—Finite element generation, e.g. wire-frame surface description, tesselation

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Graphics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Geometry (AREA)
  • Software Systems (AREA)
  • Length Measuring Devices By Optical Means (AREA)

Abstract

본 발명은 물체의 명암 정보로부터 3차원 형상을 복원하는 방법에 관한 것으로서, 특히, 혼성반사모델을 사용한 측광입체시법에 근간한 간접확산조명 기법을 도입하여 일반적인 반사함수를 구하고, 이에 의한 3차원 참조표를 이용함으써, 속도가 빠르고 반사면의 제약조건을 없앤 것을 특징으로 한다. 본 발명에 의한 방법에 의하여 간접 확산 조명 하에서 다양한 물체면에 대하여 실험을 수행하여 다양한 반사 특성을 가진 물체에 대한 표면 반사 특성, 반사비율(전반서, 난반사 비율등)해석 및 3차원 참조표를 작성하면, 물체의 3차원 정보를 실시간에 얻어낼 수 있으므로 실제 산업현장에서의 적용이 가능하다.The present invention relates to a method for reconstructing a three-dimensional shape from light and dark information of an object, and more particularly, to a general reflection function by introducing an indirect diffuse illumination technique based on a photometric stereoscopic method using a hybrid reflection model, By using the reference table, it is characterized in that the speed is fast and the constraint condition of the reflection surface is eliminated. According to the method according to the present invention, experiments are performed on various object surfaces under indirect diffuse illumination to analyze the surface reflection characteristics, reflection ratio (total reflection, diffuse reflection ratio, etc.) and three-dimensional reflection Dimensional information of an object can be obtained in real time, so that it can be applied in an actual industrial field.

Description

간접확산조명을 이용한 혼성반사면의 형상복원방법Reconstruction Method of Hybrid Reflective Surface Using Indirect Diffusion Lighting

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is a trivial issue, I did not include the contents of the text.

제5도는 본 발명에 의한 방법의 성능을 평가하기 위한 실험 거리 영상을 나타내는 도면.FIG. 5 shows an experimental distance image for evaluating the performance of the method according to the present invention. FIG.

제6도는 표면 반사 함수를 이용하여 생성된 명암 영상들을 나타내는 도면.FIG. 6 is a view showing contrast images generated using a surface reflection function; FIG.

제7도 및 제8도는 본 발명에 의한 방법으로 구한 법선 성분을 2.5차원 바늘 지도를 나타낸 도면.FIGS. 7 and 8 are views showing a 2.5-dimensional needle map of the normal component obtained by the method according to the present invention. FIG.

Claims (4)

물체의 명암 정보로부터 물체의 3차원 정보를 복원하는 방법에 있어서, 물체의 반사면에서의 밝기를 난반사면 성분에 의한 밝기와 전반사면 성분에 의한 밝기의 선형 결합으로 표시하는 혼성반사면 모델 및 간접 확산 조명 기법을 도입하는 것을 특징으로 하는 간접확산조명을 이용한 혼성반사면의 형상복원방법.A method of reconstructing three-dimensional information of an object from light and dark information of an object, the method comprising: a hybrid reflection surface model in which the brightness on the reflection surface of an object is expressed by a linear combination of brightness by the irregular reflection surface component and brightness by the total slope component; A method for restoring the shape of a hybrid reflection surface using indirect diffusion illumination, characterized by introducing a diffusion illumination technique. 제1항에 있어서, 상기 형상복원방법은 상기 혼성반사면 모델과 간접 확산 조명 기법에 의하여 일반적인 반사함수를 유도하는 과정을 포함하는 것을 특징으로 하는 간접확산조명을 이용한 혼성반사면의 형상복원방법.The method of claim 1, wherein the shape restoration method includes deriving a general reflection function by using the hybrid reflection surface model and the indirect diffusion illumination technique. 제2항에 있어서, 상기 형상복원방법은 상기의 일반적인 반사함수를 반구 영상에 적용하여 3차원 참조표를 작성하는 과정을 포함하는 것을 특징으로 하는 간접확산조명을 이용한 혼성반사면의 형상복원방법.The method of claim 2, wherein the shape restoration method includes applying the general reflection function to the hemispherical image to create a three-dimensional reference table. 제3항에 있어서, 상기 형상복원방법은 측정된 물체의 명암 영상과 상기의 3차원 참조표와 비교하고 일대일 매칭하여 물체의 3차원 정보를 얻어내는 것임을 특징으로 하는 간접확산조명을 이용한 혼성반사면의 형상복원방법.4. The method according to claim 3, wherein the shape restoration method compares the contrast image of the measured object with the three-dimensional reference table, and obtains three-dimensional information of the object by one-to- / RTI > ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: It is disclosed by the contents of the first application.
KR1019960000317A 1996-01-09 1996-01-09 Shape reconstruction method of non-lambertian surfaces using diffuse lighting KR100210654B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019960000317A KR100210654B1 (en) 1996-01-09 1996-01-09 Shape reconstruction method of non-lambertian surfaces using diffuse lighting

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019960000317A KR100210654B1 (en) 1996-01-09 1996-01-09 Shape reconstruction method of non-lambertian surfaces using diffuse lighting

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KR970060972A true KR970060972A (en) 1997-08-12
KR100210654B1 KR100210654B1 (en) 1999-07-15

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KR100479983B1 (en) * 2001-09-14 2005-03-30 이상욱 Generalized photometric stereo for the hybrid reflectance model using an image sequences

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