Outdoor Shadow Modelling and Its Applications

Published date : 15 Mar 2016

This chapter deals with shadow modelling and its utilities in shadow detection and weather estimation in out-door space. Noting the diuse skylight is scattered by particles in the atmosphere, we view the skylight, which casts the shadow, as a linear combination of scattered sunlight obeying Rayleigh scattering and Mie theory. Thus, we propose a ratio on the shadow-sunlit boundary which only depends on atmospheric condition. This ratio recasts recovering the shadow areas into a clustering setting making use of active contours.

Book/Book Chapter
Handbook of Pattern Recognition and Computer Vision, 5th Edition, 15 Mar 2016, ISBN: 978-981 4656258

Segmentation and Estimation of Spatially Varying Illumination

Published date : 12 Jun 2014

In this paper, we present an unsupervised method for segmenting the illuminant regions and estimating the illumination
power spectrum from a single image of a scene lit by multiple light sources. Here, illuminant region segmentation is

Journal Paper
IEEE Transactions on Image Processing (Volume:23, Issue: 8 ), Pg 3478-3489 doi: 10.1109/TIP.2014.2330768