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CVPR
2003
IEEE
14 years 11 months ago
Recognizing Objects in Adversarial Clutter: Breaking a Visual CAPTCHA
In this paper we explore object recognition in clutter. We test our object recognition techniques on Gimpy and EZGimpy, examples of visual CAPTCHAs. A CAPTCHA ("Completely Au...
Greg Mori, Jitendra Malik
CVPR
2003
IEEE
14 years 11 months ago
Adaptive View-Based Appearance Models
We present a method for online rigid object tracking using an adaptive view-based appearance model. When the object's pose trajectory crosses itself, our tracker has bounded ...
Louis-Philippe Morency, Ali Rahimi, Trevor Darrell
CVPR
2003
IEEE
14 years 11 months ago
Polydioptric Camera Design and 3D Motion Estimation
Most cameras used in computer vision applications are still based on the pinhole principle inspired by our own eyes. It has been found though that this is not necessarily the opti...
Cornelia Fermüller, Jan Neumann, Yiannis Aloi...
CVPR
2003
IEEE
14 years 11 months ago
Practical Non-parametric Density Estimation on a Transformation Group for Vision
It is now common practice in machine vision to define the variability in an object's appearance in a factored manner, as a combination of shape and texture transformations. I...
Erik G. Miller, Christophe Chefd'Hotel
CVPR
2003
IEEE
14 years 11 months ago
Expectation Grammars: Leveraging High-Level Expectations for Activity Recognition
Video-based recognition and prediction of a temporally extended activity can benefit from a detailed description of high-level expectations about the activity. Stochastic grammars...
David Minnen, Irfan A. Essa, Thad Starner
CVPR
2003
IEEE
14 years 11 months ago
A performance evaluation of local descriptors
Krystian Mikolajczyk, Cordelia Schmid
CVPR
2003
IEEE
14 years 11 months ago
Illumination Normalization with Time-dependent Intrinsic Images for Video Surveillance
Cast shadows produce troublesome effects for video surveillance systems, typically for object tracking from a fixed viewpoint, since it yields appearance variations of objects dep...
Yasuyuki Matsushita, Ko Nishino, Katsushi Ikeuchi,...
CVPR
2003
IEEE
14 years 11 months ago
Pose reconstruction with an uncalibrated Computed Tomography imaging device
Benjamin Maurin, Christophe Doignon, Michel de Mat...
CVPR
2003
IEEE
14 years 11 months ago
Local Appearance-Based Models using High-Order Statistics of Image Features
Baback Moghaddam, David Guillamet, Jordi Vitri&agr...