Object Recognition Using a Multichannel Vision System

1. 表面反射模型分析首先，提出了两种类型的二色反射模型来表示热敏热升华、喷墨、碳粉和卤化银四种打印机打印的各种硬拷贝物体的表面光谱反射率。接下来，我们提出了一个实验装置和一组计算来确定表面反射模型的各种参数。该装置由一个发射平行光束的照明系统、一个角度旋转台和一个具有六个光谱通道的视觉系统组成。相机数据被用来估计各种参数，如光谱反射率、发光光谱、表面粗糙度、体与界面强度之比和折射率。首先，我们提出了一种基于表面光谱反射率的多通道成像系统和算法，用于识别自然场景中的物体。该成像系统由液晶滤光片、单色CCD相机和个人计算机组成。提出了从光谱图像数据中估计光源光谱功率分布和表面光谱反射率的光谱函数的算法。接下来，我们提出一种在原始电路板上识别物体材料的方法。我们开发了一种多通道摄像系统，用于观察微小物体。根据光照几何变化的反射率差异，可以区分金属和电介质。本文提出了一种仅利用物体表面的光谱反射率数据记录和渲染艺术绘画的方法。采用具有固定波段的6个光谱通道的多通道相机系统进行光谱成像。首先，描述了粗糙表面体反射分量光谱反射率的估计方法。其次，提出了一种实用的图像绘制方法。因此，从任何方向照射的艺术绘画对象的图像都使用三个照射方向的反射率数据进行渲染。少

1. Analysis of surface reflection modelsFirst, two types of dichromatic reflection models are proposed for representing the surface-spectral reflectances of a variety of hard copy objects printed by four printers of thermal dye-sublimation, ink jet, toner, and silver halide. Next, we present an experimental apparatus and set of calculations for determining various parameters of the surface reflection model. The apparatus consists of a lighting system to emit parallel beams, a goniometric rotating table, and a vision system with six spectral channels. The camera data are used to estimate various parameters such as spectral reflectance, illuminant spectrum, surface roughness, ratio of body to interface intensity, and index of refraction.2. Object recognition using a multichannel vision systemFirst, we propose a multichannel imaging system and algorithms for identifying objects in a natural scene based on surface-spectral reflectances. The imaging system is composed of a liquid-crystal tu … More nable filter, a monochrome CCD camera, and a personal computer. Algorithms are presented for estimating both spectral functions of the illuminant spectral-power distribution and surface-spectral reflectance from the spectral image data. Next, we propose a method for identifying object materials on a raw circuit board. We have developed a multichannel camera system for observing tiny objects. We can distinguish metals and dielectrics based on the difference of reflectance in changing illumination geometries.3. Recording and rendering of art paintings by using a multichannel vision systemWe propose a method for recording and rendering of art paintings using only spectral reflectance data of the object surfaces. A multichannel camera system with six spectral channels of fixed wavelength bands is used for spectral imaging. First, a method for estimating spectral reflectance for body reflection component of a rough surface is described. Next a method is proposed for practical image rendering. As a result, the image of an art painting object illuminated from any direction is rendered using the reflectance data obtained for three illumination directions. Less