S.R. Marschner, D.P. Greenberg, Inverse lighting for photography, in: Fifth Color Imaging Conf., 1997, pp. 262--265. Home/Search Document Details and Download
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The Radiometry of Multiple Images - Tuan Luong Pascal (3 citations) (Correct)
....based on the Lambertian model. Radiometric parameters such as the illumination or the albedo were a byproduct. A second family of methods, more in the spirit of our approach, aims to recover radiometric parameters assuming that the camera and object geometry is available. In inverse lighting [ 24, 25 ] it is assumed that the reflectance is Lambertian, and known or constant. The illuminant is modeled as a linear combination of a basis of predefined lights. There is a linear relationship between the coe#cients of the linear combination and the pixel values, which makes it possible to recover the ....
....calibration parameters a i , b i , i = 1 . n, 9 and a total number of p n equations, with a su#cient number of di#erent surface elements and illuminations, we expect to be able to solve the problem of radiometric reconstruction. Note that if all the albedoes # j are known (as in [ 25 ] ) the problem becomes linear, instead of bilinear, and can be solved with a single view. This formulation shows that the radiometric reconstruction problem is similar to the geometric reconstruction problem, where we are given p 3 D points M j seen in n di#erent views of projection matrices i ....
S. Marschner and D. Greenberg. Inverse lighting for photography. In IST/SID Fifth Color Imaging Conference, pages 262--265, 1997.
A Signal-Processing Framework for Inverse Rendering - Ramamoorthi, Hanrahan (2001) (24 citations) (Correct)
....predetermined BRDFs, making use of assumed statistical characteristics of natural lighting. However, the inverse BRDF problem has not been solved for general illumination. 3. Unknown Lighting: A common solution is to use a mirrored ball, as done by Miller and Hoffman [23] Marschner and Greenberg [20] find the lighting from a Lambertian surface. D Zmura [8] proposes, but does not demonstrate, estimating spherical harmonic coefficients. For Lambertian objects, we [29] have shown how to recover the first 9 spherical harmonics. Previous work has not estimated the lighting from curved surfaces ....
.... and is well conditioned only for the lighting coefficients with l # 2, corresponding to 9 parameters 1 for order 0 ( l, m) 0, 0) 3 for order 1 (l = 1, 1 # m # 1) and 5 for order 2 (l = 2, 2 # m # 2) This explains the illconditioning observed by Marschner and Greenberg [20] in trying to solve the inverse lighting problem from a Lambertian surface. Furthermore, for practical applications, including forward rendering [28] the reflected light field from a Lambertian surface can be characterized using only its first 9 spherical harmonic coefficients; lighting effects ....
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S.R. Marschner and D.P. Greenberg. Inverse lighting for photography. In Fifth Color Imaging Conference, pages 262--265, 1997.
Illumination Distribution from Brightness in Shadows.. - Imari Sato Yoichi (1999) (14 citations) (Correct)
....17] and illumination from brightness (with a known shape and reflectance) In the past, shape from brightness and reflectance frombrightness have been extensively explored. In contrast, relatively limited amounts of research have been conducted in the third area, illumination from brightness [3, 14]. Some researchers attacked this problem as a related analysis of shape from shading. For example, Brooks and Horn determine shape as well as light sources from image brightness [7] However, their analyses are conducted under very specific illumination conditions as in, for example, the case ....
S. R. Marschner and D. P. Greenberg, "Inverse Lighting for Photography," Proc. IS&T/SID Fifth Color Imaging Conference, pp.262-265, 1997.
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S.R. Marschner, D.P. Greenberg, Inverse lighting for photography, in: Fifth Color Imaging Conf., 1997, pp. 262--265.
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S.R. Marschner and D.P. Greenberg. Inverse lighting for photography. In Fifth Color Imaging Conference 97, pages 262-- 265.
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S.R. Marschner and D.P. Greenberg. Inverse lighting for photography. In Proceedings of IS&T/SID Fifth Color Imaging Conference, pages 262--265, November 1997.
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S.R. Marschner and D.P. Greenberg. Inverse lighting for photography. In Proceedings of IS&T/SID Fifth Color Imaging Conference, pages 262--265, November 1997.
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S. Marschner and D. Greenberg. Inverse lighting for photography. In IST/SID Fifth Color Imaging Conference, pages 262--265, 1997.
On the relationship between radiance and irradiance.. - Ramamoorthi, Hanrahan (2001) (11 citations) (Correct)
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S. R. Marschner and D. P. Greenberg, "Inverse lighting for photography," in Fifth Color Imaging Conference: Color Science, Systems and Applications (Society for Imaging Science and Technology, Springfield, Va., 1997), pp. 262--265.
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S.R. Marschner and D.P. Greenberg. Inverse lighting for photography. In Fifth Color Imaging Conference, pages 262--265, 1997.
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S. R. Marschner. Inverse lighting for photography. In Fifth Color Imaging Conference, 1997.
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