Generating alpha mattes for digital images and videos using polarized screen matting with well-posed pixel filtering and polarimetric matting laplacian

Abstract

The present disclosure relates to systems, non-transitory computer-readable media, and methods for generating alpha mattes for digital images utilizing polarized screen matting. In particular, in some embodiments, the disclosed systems obtain a plurality of background images of a background polarized light source and a plurality of polarized digital images portraying a foreground subject backlit by the background polarized light source. In addition, in some embodiments, the disclosed systems determine well-posed pixels of the plurality of polarized digital images by: selecting, utilizing a polarized pixel filtering model, pixels devoid of polarized foreground light; or selecting, utilizing a phase angle filtering model, polarized pixels comprising phase angles of polarization distinct from a background phase angle of polarization in the plurality of background images. Moreover, in some embodiments, the disclosed systems generate an alpha matte from alpha matte values for the well-posed pixels utilizing a polarimetric matting Laplacian model.