Texture-Consistent Shadow Removal
Proceedings of the 10th European Conference on Computer Vision, page 437--450 — 2008
This paper presents an approach to shadow removal that
preserves texture consistency between the original shadow and lit area.
Illumination reduction in the shadow area not only darkens that area,
but also changes the texture characteristics there. We achieve textureconsistent
shadow removal by constructing a shadow-free and textureconsistent
gradient field. First, we estimate an illumination change
surface which causes the shadow and remove the gradients it induces.We
approximate the illumination change surface with illumination change
splines across the shadow boundary. We formulate estimating these
splines as an optimization problem which balances the smoothness between
the neighboring splines and their fitness to the image data. Second,
we sample the shadow effect on the texture characteristics in the umbra
and lit area near the shadow boundary, and remove it by transforming
the gradients inside the shadow area to be compatible with the lit area.
Experiments on photos from Flickr demonstrate the effectiveness of our
method.
Images and movies
BibTex references
@InProceedings{LG08, author = "Liu, Feng and Gleicher, Michael", title = "Texture-Consistent Shadow Removal", booktitle = "Proceedings of the 10th European Conference on Computer Vision", pages = "437--450", year = "2008", publisher = "Springer-Verlag", address = "Berlin, Heidelberg", doi = "http://dx.doi.org/10.1007/978-3-540-88693-8_32", url = "http://graphics.cs.wisc.edu/Papers/2008/LG08" }