《StereoMatting_CVPR2016-paper》.pdf

A Stereo Approach that Handles the Matting Problem via Image Warping 1 1 2 1 Michael Bleyer , Margrit Gelautz , Carsten Rother , Christoph Rhemann 1Institute for Software Technology and Interactive Systems 2Microsoft Research Cambridge Vienna University of Technology, Austria Cambridge, UK Abstract the mixed colors (yellow and magenta), it is likely that the disparity of the foreground pixel will be estimated wrongly. We propose an algorithm that simultaneously extracts However, we can overcome this problem by decomposing disparities and alpha matting information given a stereo the mixed color into its original color components and com- image pair. Our method divides the reference image into puting corresponding alpha values, i.e. solving the matting a set of overlapping, partially transparent color segments. problem. From the matting perspective, disparity informa- Each segment pixel is assigned an alpha value and color. tion is important, because it provides two instead of one The disparity inside the segment is modeled via a plane. mixed colors for computing an alpha value. This redun- The goodness of alphas, colors and disparity planes is mea- dancy can be exploited to reduce matting ambiguities. sured by a new energy function. Its basic idea is to use the In this work, we propose an energy minimization ap- three parameters for generating artifi cial views represent- proach for combined stereo and matting that exploits these ing the left and right images. If alphas, colors and disparity synergies. Our