光线空间表示是实现实时复杂场景自由视点视频的有效方法。提出了基于特征点检测的快速光线空间插值方法，首先采用自适应阈值提取光线空间片或图像域的特征点，然后结合遮挡问题采用相关性准则匹配特征点，根据匹配的特征点将光线空间分割成不同对象区域并进行插值，以实现快速任意视点图像绘制。实验结果表明，该方法能快速插值光线空间数据，生成的光线空间数据信噪比高、绘制的任意视点图像的主客观质量也较高。

Ray space representation is an effective approach to realizing real time free viewpoint video system with complicated scenes. A feature point based ray space interpolation method is proposed for arbitrary viewpoint image rendering in this paper. At first, feature points of ray space slice or image are extracted, then, considering occluded problem, the feature points are matched based on correlation based criterion, and each ray space slice is segmented into different regions. Finally, an interpolation operation is applied to the segmented regions. Experimental results show that the proposed method can interpolate ray space data fast and render arbitrary viewpoint images, and PSNR of the interpolated ray space data is high, as well as quality of the rendered arbitrary viewpoint images.