Dynamic feathering: minimising blending artefacts in view-dependent rendering

Abstract

Keywords:Image-based rendering, view-dependent texture mapping, feathering, image blending, image compositing. AbstractConventional view-dependent texture mapping techniques produce composite images by blending subsets of input images, weighted according to their relative influence at the rendering viewpoint, over regions where the views overlap. Geometric or camera calibration errors often result in a loss of detail due to blurring or double exposure artefacts which tends to be exacerbated by the number of blending views considered. We propose a novel view-dependent rendering technique which optimises the blend region dynamically at rendering time, and reduces the adverse effects of camera calibration or geometric errors otherwise observed. The technique has been successfully integrated in a rendering pipeline which operates at interactive frame rates. Improvement over state-of-the-art view-dependent texture mapping techniques are illustrated on a synthetic scene as well as real imagery of a large scale outdoor scene where large camera calibration and geometric errors are present.

Free-Viewpoint Video for TV Sport Production

“…All sequences were generated with automatic calibration, 2D segmentation, reconstruction and refinement. View-dependent rendering is performed using the view-dependent geometry to ren-der images from the adjacent views with dynamic feathering over cameras rendered from different views [19]. The statdium backgrounds are manually modelled using either images from the captured sequences as in Figure 13(a) or a synthetic appearance Figure 13(c).…”