Image Based Rendering under Varying Illumination

A new approach for photorealistic rendering of a class of objects at arbitrary illumination is presented. The approach of the authors relies entirely on image based rendering techniques. A scheme is utilized for re-illumination of objects based on linear combination of low dimensional image representations. The minimum rendering condition of technique of the authors is three sample images under varying illumination of a reference object and a single input image of an interested object. Important properties of this approach are its simplicity, robustness and speediness. Experimental results validate the proposed rendering approach.     

基于特征点的图像变形技术及其应用

对图像变形中的两个问题-特征匹配和变换函数，提出了一种新的解决方法，并在此基础上进一步提出了变换控制的概念，用关键点匹配来寻找对应的特征点，在特征对应的基础上用三角化的方法建立两图像间的局部对应关系，并用三角化的方法求得非均匀变换中各种特征点的变换系数，针对非均匀变换出现的特征间形状和位置不吻合问题用前变换的过程加以解决。