关键词: 光线空间插值, 图像配准, 仿射变换, 小波变换域, 虚拟视点绘制

Abstract:

In order to effectively deal with the shape variation and noise pollution of the corresponding area in diffe-rent views and, thereby, improve the quality and speed of viewpoint image synthesis, a ray-space interpolationmethod based on affine projection is proposed. In this method, first, the scale-invariant feature transform is appliedto the feature detection and image matching for determining the affine transformation matrix among multi-viewpointimages. Then, ray-space interpolation is implemented via the projection through affine transformation matrix. Finally,a virtual viewpoint image is synthesized in the wavelet transform domain. Experimental results show that the pro-posed method is superior to the traditional block-matching interpolation and DDFI (Disparity Domain Filtering In-terpolation) methods in terms of PSNR and computation time of the virtual viewpoint image.

Key words: ray-space interpolation, image registration, affine transformation, wavelet transform domain, virtualviewpoint synthesis