Generalized bas-relief ambiguity
WebChandraker, M. K., Kahl, F., and Kriegman, D. J. 2005. Reflections on the generalized bas-relief ambiguity. In 2005 IEEE Computer Society Conference on Computer Vision and Pattern Recognition (CVPR 2005), 20--26 June 2005, San Diego, CA, USA, 788--795. Google Scholar Digital Library Webject can only be determined up to a linear ambiguity [10]. Later it is shown [26, 3] that this ambiguity can be reduced to the generalized bas-relief (GBR) ambiguity by enforcing the integrability constraint. This paper focuses on further resolving the GBR ambiguity. Reflectance of an opaque material is described by
Generalized bas-relief ambiguity
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WebResolving the Generalized Bas-Relief Ambiguity by Entropy Minimization Neil G. Alldrin Satya P. Mallick David J. Kriegman University of California, San Diego. Image Formation … WebMay 28, 2002 · The Generalized Bas Relief (GBR) ambiguity is obtained as a special case of the KGBR and it is shown that either, or both, resolve this ambiguity by biasing towards objects with planar geometry. 6 PDF View 1 excerpt, references background The Bas-Relief Ambiguity P. Belhumeur, D. Kriegman, A. Yuille Physics
WebGeneralized Bas-Relief (GBR) ambiguity. In this paper, we examine this ambiguity in the context of surfaces hav-ing anadditive non-Lambertianreectance component,and we show that the GBR ambiguity is resolved by any non-Lambertian reectance function that is isotropic and spa-tially invariant. The key observation is that each point on http://www.eecs.harvard.edu/~zickler/papers/IsotropyReciprocityGBR_CVPR2007.pdf
这里要介绍一个名词——广义浅浮雕歧义(Generalized Bas-Relief Ambiguity)[Belhumeur97]：当正交地观察一个具有郎伯表面的物体，决定其三维形状时具有隐式的歧义，物体表面通过广义浅浮雕转换后不能被辨别。对于由任意数量的遥远光源照射的物体的每一幅图像，都 ... See more 其中： m ∈ R + \ m \in R_+ m∈R+是测量到的像素的强度（像素值） e ∈ R + \ e \in R_+ e∈R+是光源强度（辐射强度） ρ ∈ R + \ \rho \in R_+ ρ∈R+是郎伯表面的漫反射率 l \ l l 是3维的单位光源位置向量 n \ n n是3维的表面法向量 在 … See more m ∈ R + \ m \in R_+ m∈R+是测量到的像素的强度（像素值） e ∈ R + \ e \in R_+ e∈R+是光源强度（辐射强度） ρ ∈ R + \ \rho \in R_+ ρ∈R+是 … See more WebA generalized bas-relief (GBR) transformation changes both the surface shape and albedo pattern. In particular, if.x;y/denotes the coordinates of points in an image plane, and z …
WebJun 1, 2012 · The ambiguity can be further reduced to 3 parameters, the so-called generalized bas-relief ambiguity (GBR) [47], using an integrability constraint, which enforces that a consistent surface can...
WebIn this paper, we analyze the features learned by this method and find that they strikingly resemble attached shadows, shadings, and specular highlights, which are known to provide useful clues in resolving the generalized bas-relief (GBR) ambiguity. median higher than meanWeb1.1. The GBR Ambiguity It is well established that a set of images of a Lamber-tian surface under varying, distant lighting do not com-pletely determine its Euclidean shape. Given … median home income usaWebThough the bas-relief ambiguity is resolved for general 3D surfaces using interreflections, we prove that a non-linear ambiguityremainsin the case of surfaceswith translational … penfed credit union hrWebJan 1, 2016 · Under orthographic projection from an unknown viewpoint, there exists an ambiguity that corresponds to the group of three-dimensional affine transformations, … penfed credit union locations floridaWebJun 17, 2007 · It is well known in the photometric stereo literature that uncalibrated photometric stereo, where light source strength and direction are unknown, can recover … median historiamedian high tideWebReflections on the Generalized Bas-Relief Ambiguity Manmohan Krishna Chandraker Fredrik Kahl David J. Kriegman Department of Computer Science and Engineering … penfed credit union corporate office tysons