| 照明方向及反射特性参数的鲁棒估计(英文) |
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| 引用本文： | 章国宝,叶桦,陈维南. 照明方向及反射特性参数的鲁棒估计(英文)[J]. 东南大学学报, 1998, 0(1) |
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| 作者姓名： | 章国宝 叶桦 陈维南 |
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| 作者单位： | 东南大学自动化研究所 |
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| 摘 要： | 由图象明暗度提取物体表面三维形状需要预知照明方向及表面反射特性等参数，但这些参数在实际应用中往往难于得到．本文提出了一种直接由灰度图象估计照明方向和反射特性参数的方法．实验证明，该方法在图象存在奇点的情况下，能快速准确地估计这些参数．
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| 关 键 词： | 由明暗度求形状；反射；计算机视觉；图象处理 |
Estimation of Illuminant Direction and Albedo from Shading |
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| Zhang Guobao Ye Hua Chen Weinan. Estimation of Illuminant Direction and Albedo from Shading[J]. Journal of Southeast University(English Edition), 1998, 0(1) |
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| Authors: | Zhang Guobao Ye Hua Chen Weinan |
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| Affiliation: | Zhang Guobao * Ye Hua Chen Weinan |
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| Abstract: | Assuming uniform albedo and Lambertian surface for the imaging model, a new robust method for estimation of illuminant direction and albedo from shading is presented. If there is a singular point with maximum intensity in an image, the method use shading information of the singular point and its neighbors to estimate directly the elevation of illuminant direction, surface albedo, and the bias brightness. Some experiment results on synthetic images are given to illustrate the new approach is accurate and robust. |
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| Keywords: | image processing computer vision reflection shape from shading |
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