利用亮度特性的形象复原

提示了从明暗图像中复原三维信息的新方法.Photometric Stereo Method(PSM)一般以直接照明为前提.在研究中采取PSM间接扩散照明,适用了漫反射成分和全反射成分所构成的混性反射模型.在混性反射模型和间接扩散照明的条件下,物体面的亮度分布比率与表面法线向量的关系中导出了反射函数.接着把得出的反射函数带入到输入在相机的物体像素亮度,从而得到发现向量.利用这个发现向量可以复原物体的三维形象.物体的三维形象复原是通过物体表面粗糙,表面反射率,还有物体像素亮度而得出的表面法线向量来求出的.因为所提示的研究采用了亮度参照表,形象复原的速度既快又准确.反射函数被广泛定义,对具有多种形态表面特性的物体适用可行.

Object Recognition Using Intensity Properties

A new approach is presented for recovering the 3D shape from shading image.Photometric Stereo Method(PSM) is generally based on the direct illumination.PSM is modified with the Indirect Diffuse Illumination Method(IDIM),and then applied to hybrid reflectance model,which consists of two components,the Lambertian reflectance and the specular reflectance.Under the hybrid reflectance model and the indirect diffuse illumination circumstance,the 3D shape of objects can be recovered from the surface normal vector extracted from the surface roughness,the surface reflectance ratio,and the intensity value of a pixel.This method is rapid because of using the reference table,simplifies the restriction condition about the reflectance function in prior studies without any loss in performance,and can be applied to various types of surfaces by defining general reflectance function.