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

为了建立透视投影模型和两个点光源的光度立体，研究了不同光照条件下灰度图像的形状估计问题。提出了几种利用颜色纹理和镜面反射分量恢复目标高斯曲率相对大小的方法，以及利用FMM和自标定重建镜面反射目标形状的方法。该设备的结构被设计成在两个光源下对真实物体进行连续拍摄，以预期其在内窥镜中的应用。

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.