Illuminant direction and shape of a bump

Journal of the Optical Society of America A: Optics and Image Science, and Vision

Volumn 15, Issue 9, 1998, Pages 2341-2350

  Kim, Chang Yeong ^a   Petrov, A P ^b   Choh, Heui Keun ^a   Seo, Yang Seck ^a   Kweon, In So ^c  

^a Samsung Advanced Institute of Technology (SAIT)   (South Korea)

^b KURCHATOV INSTITUTE   (Russian Federation)

^c Korea Advanced Institute of Science and Technology (KAIST)   (South Korea)

Author keywords

[No Author keywords available]

Indexed keywords

EID: 0004193637     PISSN: 10847529     EISSN: 15208532     Source Type: Journal    
DOI: 10.1364/JOSAA.15.002341     Document Type: Article

References (20)

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9. B. K. P. Horn and M. J. Brooks, “Introduction,” in Shape from Shading, B. K. P. Horn and M. J. Brooks, eds. (MIT Press, Cambridge, Mass., 1989), pp. 9–12.
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16. A rectangular window can also be used. In this case the formulas must be slightly changed.
17. The functions under integral are concave, and this fact should be taken into account when an integration procedure is chosen.
18. The sign is chosen for a convex bump, and the square root must be taken as positive and symmetrical.
19. D. Gibbins, “Estimating illuminant conditions for shape from shading,” Ph.D. dissertation (School of Information Science and Technology, The Flinders University of South Australia, Bedford Park, South Australia, 1994).
20. Until we consider the task of global interpretation of an image, we must keep both options. Because of the reciprocal relation between the illuminant direction and signatures of the Hessian matrices recovered, the full number of variants does not increase.