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Separation of diffuse and specular components of surface reflection by using Independent Component Analysis

使用独立分量分析分离表面反射的漫反射和镜面反射分量

基本信息

批准号：
14580439
负责人：
UMEYAMA Shinji
金额：
$ 2.3万
依托单位：
National Institute of Advanced Industrial Science and Technology (AIST)
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2002
资助国家：
日本
起止时间：
2002 至 2003
项目状态：
已结题

项目摘要

(1)We made an experimental observation system with a high-precision digital video camera and a rotating polarizer which is controlled by a computer. By using this system, we made a separation experiment of diffuse and specular reflection components of an object. The separation result was good, and we presented this result in MIRU2002. In this experiment we developed a new separation algorithm which uses a special property of the task, such as the problem includes only two components. The proposed algorithm computes the mutual information between estimated two components directly. Since it is a kind of enumeration algorithm, it is stable and we can set algorithm parameters very easily.(2)We made a simultaneous observation system of two images in order to make our method applicable to cases that objects or lights move. In this system we used a half-mirror prism. The light from the object is split into two rays by the prism, and they are observed by two different video cameras equipped with polarizers of different polarizing directions. This observation system simultaneously gives two images with different amount of specular and diffuse components. This system can capture 16 pairs of images per second. This result was presented in SSIIO9.(3)The proposed separation method appeared in IEEE Trans. on PAMI in April 2004.

(1)制作了高精度数字摄像机和计算机控制的旋转偏光镜实验观测系统。利用该系统，我们对物体的漫反射和镜面反射分量进行了分离实验。分离结果很好，我们在 MIRU2002 中展示了这个结果。在这个实验中，我们开发了一种新的分离算法，它使用任务的特殊属性，例如问题仅包含两个组件。所提出的算法直接计算估计的两个分量之间的互信息。由于它是一种枚举算法，所以它很稳定，我们可以很容易地设置算法参数。(2)我们制作了两个图像的同时观察系统，以使我们的方法适用于物体或灯光移动的情况。在这个系统中，我们使用了半反射镜棱镜。来自物体的光被棱镜分成两束光线，并由两个配备有不同偏振方向的偏振器的不同摄像机观察。该观察系统同时给出具有不同数量的镜面反射和漫反射分量的两个图像。该系统每秒可捕捉 16 对图像。该结果发表在SSIIO9中。(3)所提出的分离方法出现在IEEE Trans。 2004 年 4 月在 PAMI 上。