The Shadow Meets the Mask: Pyramid-Based Shadow Removal

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dc.contributor.authorShor, Yaelen_US
dc.contributor.authorLischinski, Danien_US
dc.date.accessioned2015-02-21T16:19:33Z
dc.date.available2015-02-21T16:19:33Z
dc.date.issued2008en_US
dc.description.abstractIn this paper we propose a novel method for detecting and removing shadows from a single image thereby obtaining a high-quality shadow-free image. With minimal user assistance, we first identify shadowed and lit areas on the same surface in the scene using an illumination-invariant distance measure. These areas are used to estimate the parameters of an affine shadow formation model. A novel pyramid-based restoration process is then applied to produce a shadow-free image, while avoiding loss of texture contrast and introduction of noise. Unlike previous approaches, we account for varying shadow intensity inside the shadowed region by processing it from the interior towards the boundaries. Finally, to ensure a seamless transition between the original and the recovered regions we apply image inpainting along a thin border. We demonstrate that our approach produces results that are in most cases superior in quality to those of previous shadow removal methods. We also show that it is possible to easily composite the extracted shadow onto a new background or modify its size and direction in the original image.en_US
dc.description.number2en_US
dc.description.seriesinformationComputer Graphics Forumen_US
dc.description.volume27en_US
dc.identifier.doi10.1111/j.1467-8659.2008.01155.xen_US
dc.identifier.issn1467-8659en_US
dc.identifier.pages577-586en_US
dc.identifier.urihttp://dx.doi.org/10.1111/j.1467-8659.2008.01155.xen_US
dc.publisherThe Eurographics Association and Blackwell Publishing Ltden_US
dc.titleThe Shadow Meets the Mask: Pyramid-Based Shadow Removalen_US
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