Appearance estimation and reconstruction of glossy object surfaces based on the dichromatic reflection model
Appearance estimation and reconstruction of glossy object surfaces based on the dichromatic reflection model
复制标题
DOI：
10.1002/col.22824
复制
发表时间：
2022-09-26
影响因子：
1.4
通讯作者：
Yong, Roseline Kim Fong
中科院分区：
文献类型：
--
作者：
Tominaga, Shoji;Yong, Roseline Kim Fong
我们提出了一种方法，用于估计和重建的物质外观的基础上获得的光谱图像数据在复杂的照明环境中的多个光源。物体外观可以在不同的几何和光谱照明条件下用各种材料属性（例如光谱反射率、光泽度和消光度）来构造。假设物体由具有光泽或镜面反射的非均匀电介质材料制成。来自物体表面的颜色信号由标准二色反射模型描述，该模型由漫反射和镜面反射组成，其中镜面反射分量具有与光源相同的光谱组成。物体的整体外观由基于反射率和光源光谱的色度因素以及表示表面照明的表面几何形状的阴影项的组合来确定。因此，可以通过修改色彩因子和明暗项来重建新物体的外观。该方法包括四个步骤：（1）光源估计，（2）光谱反射率估计，（3）阴影项估计和区域分割，（4）基于反射模型的外观重建。所提出的方法在使用不同光源照射不同材料的物体的实验中得到了验证。我们展示了典型的重建结果与新的对象外观。
We propose an approach for estimating and reconstructing the material appearance of objects based on the spectral image data acquired in complex illumination environments with multiple light sources. The object appearance can be constructed with various material properties such as spectral reflectance, glossiness, and matteness under different geometric and spectral illumination conditions. The objects are assumed to be made of an inhomogeneous dielectric material with gloss or specularity. The color signals from the object surface are described by the standard dichromatic reflection model, which consists of diffuse and specular reflections, where the specular component has the same spectral composition as the illuminant. The overall appearance of objects is determined by a combination of chromatic factors, based on the reflectance and illuminant spectra, and shading terms, which represent the surface geometries of the surface illumination. Therefore, the appearance of a novel object can be reconstructed by modifying the chromatic factors and shading terms. The method for appearance estimation and reconstruction comprises four steps: (1) illuminant estimation, (2) spectral reflectance estimation, (3) shading term estimation and region segmentation, and (4) appearance reconstruction based on the reflection model. The proposed approach is validated in an experiment in which objects of different materials are illuminated using different light sources. We demonstrate typical reconstruction results with novel object appearances.