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Discrimination of objects Based on Surface Reflectance Characteristics

基于表面反射特性的物体判别

基本信息

批准号：
02680034
负责人：
TOMINAGA S.
金额：
$ 1.09万
依托单位：
Osaka Electro-Communication University
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1990
资助国家：
日本
起止时间：
1990 至 1991
项目状态：
已结题

项目摘要

1. A color reflection model for inhomogeneous objectsThe standard reflection model for inhomogeneous materials assumes that light is reflected by two independent mechanisms. We have developed a method for testing the standard reflection model. Next a computational method has been proposed for estimating the illuminant spectral distribution from observed spectra reflected from two object surfaces. The validity of the model and the reliability of the method are confirmed on experiments using some inhomogeneous objects of plastics.2. Color reflection models for a variety of objectsColor reflection models have been proposed for a variety of objects based on the analysis of the reflected light spectra from the object-surfaces and their surface spectral reflectances. We have presented a procedure for testing the adequacy of the standard reflection model on real objects in our everyday lives. The test results shows that the standard model is adequate for many materials, but inadequate for metals composed of only specular reflection, and for some of papers and cloths. By a detailed analysis of the surface reflectance of these materials, it has been shown that the light reflection can be expressed in an extended dichromatic reflection model.3. Surface identification using the standard reflection modelMany surfaces of objects are assumed to be composed of inhomogeneous materials, whose surface spectral reflectance function is described as the sum of a specular reflectance and a diffuse reflectance. The specular component is used to estimate the spectral power distribution of the illuminant, while the diffuse component is used as the principal indication of the surface identity. In real measurement of a scene, a number of the surface-spectral reflectances observed from spatially different locations depends on the different body components. Here we have developed a method for recovering the diffuse reflectance function of each surface in two steps.

1.非均匀物体的颜色反射模型非均匀材料的标准反射模型假设光被两种独立的机制反射。我们开发了一种测试标准反射模型的方法。其次，提出了一种计算方法，用于从两个物体表面反射的观测光谱估计光源光谱分布。通过对非均匀塑料物体的实验，验证了模型的有效性和方法的可靠性.各种物体的颜色反射模型通过对物体表面反射光谱及其表面光谱反射率的分析，提出了各种物体的颜色反射模型。我们已经提出了一个程序，用于测试的充分性标准反射模型在我们日常生活中的真实的对象。实验结果表明，标准模型对许多材料都是适用的，但对仅由镜面反射组成的金属以及某些纸张和布料则不适用。通过对这些材料表面反射率的详细分析，表明光反射可以用扩展的二色反射模型来表达。3.利用标准反射模型进行表面识别许多物体表面被假定为由非均匀材料组成，其表面光谱反射函数被描述为镜面反射和漫反射的总和。镜面分量用于估计光源的光谱功率分布，而漫射分量用作表面身份的主要指示。在场景的真实的测量中，从空间上不同的位置观察到的表面光谱反射率的数量取决于不同的身体成分。在这里，我们已经开发了一种方法，用于恢复每个表面的漫反射函数在两个步骤。