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Now showing items 141-150 of 225
How do Humans Determine Reflectance Properties under Unknown Illumination?
(2001-10-21)
Under normal viewing conditions, humans find it easy to distinguish between objects made out of different materials such as plastic, metal, or paper. Untextured materials such as these have different surface reflectance ...
Learning Object-Independent Modes of Variation with Feature Flow Fields
(2001-09-01)
We present a unifying framework in which "object-independent" modes of variation are learned from continuous-time data such as video sequences. These modes of variation can be used as "generators" to produce a manifold of ...
Recognition of Surface Reflectance Properties from a Single Image under Unknown Real-World Illumination
(2001-10-21)
This paper describes a machine vision system that classifies reflectance properties of surfaces such as metal, plastic, or paper, under unknown real-world illumination. We demonstrate performance of our algorithm for ...
Stable Mixing of Complete and Incomplete Information
(2001-11-08)
An increasing number of parameter estimation tasks involve the use of at least two information sources, one complete but limited, the other abundant but incomplete. Standard algorithms such as EM (or em) used in this context ...
Simplifying transformations for type-alpha certificates
(2001-11-13)
This paper presents an algorithm for simplifying NDL deductions. An array of simplifying transformations are rigorously defined. They are shown to be terminating, and to respect the formal semantis of the language. We also ...
Exploring Vision-Based Interfaces: How to Use Your Head in Dual Pointing Tasks
(2002-01-01)
The utility of vision-based face tracking for dual pointing tasks is evaluated. We first describe a 3-D face tracking technique based on real-time parametric motion-stereo, which is non-invasive, robust, and self-initialized. ...
Learning with Deictic Representation
(2002-04-10)
Most reinforcement learning methods operate on propositional representations of the world state. Such representations are often intractably large and generalize poorly. Using a deictic representation is believed to be ...
Shape-Time Photography
(2002-01-10)
We introduce a new method to describe, in a single image, changes in shape over time. We acquire both range and image information with a stationary stereo camera. From the pictures taken, we display a composite image ...
Keeping Secrets in Hardware: the Microsoft Xbox(TM) Case Study
(2002-05-26)
This paper discusses the hardware foundations of the cryptosystem employed by the Xbox(TM) video game console from Microsoft. A secret boot block overlay is buried within a system ASIC. This secret boot block decrypts and ...
Advanced Programming Language Features for Executable Design Patterns "Better Patterns Through Reflection
(2002-03-22)
The Design Patterns book [GOF95] presents 24 time-tested patterns that consistently appear in well-designed software systems. Each pattern is presented with a description of the design problem the pattern addresses, as ...