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FOCS
2009
IEEE
16 years 1 months ago
Higher Eigenvalues of Graphs
— We present a general method for proving upper bounds on the eigenvalues of the graph Laplacian. In particular, we show that for any positive integer k, the kth smallest eigenva...
Jonathan A. Kelner, James R. Lee, Gregory N. Price...
SIBGRAPI
2009
IEEE
16 years 1 months ago
Fractal-JSEG: JSEG Using an Homogeneity Measurement Based on Local Fractal Descriptor
—This paper proposes an improved version for the JSEG color image segmentation algorithm, combining the classical JSEG algorithm and a local fractal operator that measures the fr...
Karin S. Komati, Evandro O. T. Salles, Maái...
SCALESPACE
2009
Springer
16 years 1 months ago
A Non-local Approach to Shape from Ambient Shading
We study the mathematical and numerical aspects of the estimation of the 3-D shape of a Lambertian scene seen under diffuse illumination. This problem is known as “shape from amb...
Emmanuel Prados, Nitin Jindal, Stefano Soatto
ICPR
2008
IEEE
16 years 1 months ago
Scribble-a-Secret: Similarity-based password authentication using sketches
This paper presents a sketch-based password authentication system called Scribble-a-Secret as a graphical password scheme in which free-form drawings are used as a means to authen...
Mizuki Oka, Kazuhiko Kato, Yingqing Xu, Lin Liang,...
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ICPR
2008
IEEE
16 years 1 months ago
Fast multiple instance learning via L1, 2 logistic regression
In this paper, we develop an efficient logistic regression model for multiple instance learning that combines L1 and L2 regularisation techniques. An L1 regularised logistic regr...
Zhouyu Fu, Antonio Robles-Kelly