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SIAMIS
2011
12 years 10 months ago
On the Illumination Invariance of the Level Lines under Directed Light: Application to Change Detection
We analyze the illumination invariance of the level lines of an image. We show that if the scene surface has Lambertian reflectance and the light is directed, then a necessary and...
Pierre Weiss, Alexandre Fournier, Laure Blanc-F&ea...
ISM
2008
IEEE
100views Multimedia» more  ISM 2008»
14 years 2 months ago
Robust Edge Detection Based on Non-local Contribution of Local Frequency Characteristics
This paper introduces a robust approach to the problem of edge detection in situations characterized by high levels of image degradation and illumination non-uniformity. Popular e...
Alexander Wong, William Bishop
BMVC
2001
13 years 10 months ago
Illumination technique for optical dynamic range compression and offset reduction
This paper presents a novel illumination technique for image processing in environmentswhich are characterized by large intensity fluctuations and hence a high optical dynamic ra...
C. Koch, S.-B. Park, Tim J. Ellis, A. Georgiadis
ECCV
2002
Springer
14 years 9 months ago
Estimation of Multiple Illuminants from a Single Image of Arbitrary Known Geometry
We present a new method for the detection and estimation of multiple illuminants, using one image of any object with known geometry and Lambertian reflectance. Our method obviates ...
Yang Wang, Dimitris Samaras
CVPR
2007
IEEE
14 years 9 months ago
Robust Change-Detection by Normalised Gradient-Correlation
A novel algorithm for robustly segmenting changes between different images of a scene is presented. This computationally efficient algorithm is based on a non-linear comparison of...
Robert O'Callaghan, Tetsuji Haga