Three Dimensional Shape Recovery from Endoscopic Images by UsingPhotometric Stereo with Two Directional Point Light Sources

为了建立基于透视投影模型和两点光源的光度立体视觉，研究了不同光照条件下灰度图像的形状估计问题。提出了几种方法来恢复具有彩色纹理和镜面反射分量的物体上高斯曲率的相对大小，并通过FMM和自校准来重建具有镜面反射分量的物体的形状。设计了一种在双光源下对真实的物体进行连续拍摄的装置结构，并将其应用于内窥镜。

Estimation of the shape from grayscale images under different lighting conditions was studied in order to establish photometric stereo with perspective projection model and two point light sources. Several methods were proposed to recover the relative size of Gaussian curvature on an object with color textures and specular reflectance component, and to reconstruct the shape of the object with specular reflection by FMM and self-calibration. The structure of equipment was designed to perform continuous shooting a real object under two light sources in anticipation of its application to endoscope.