An important element of this framework, which we exploit, is to perform the motion estimation between the current new input image and a warped (resampled) version of the mosaic. This allows us to estimate only incremental deformations of images (or equivalently, instantaneous motion), which greatly…
We present a parametric method to automatically identify people in monocular low-resolution video by estimating the height and stride parameters of their walking gait. Stride parameters (stride length and cadence) are functions of body height, weight, and gender. Previous work has demonstrated effective use of…
Real scenes are full of specularities (highlights and reflections), and yet most vision algorithms ignore them. In order to capture the appearance of realistic scenes, we need to model specularities as separate layers. In this paper, we study the behavior of specularities in static scenes…
Presents a correspondence-free method to automatically estimate the spatio-temporal parameters of gait (stride length and cadence) of a walking person from video. Stride and cadence are functions of body height, weight and gender, and we use these biometrics for identification and verification of people. The…
A motion-based, correspondence-free technique or human gait recognition in monocular video is presented. We contend that the planar dynamics of a walking person are encoded in a 2D plot consisting of the pairwise image similarities of the sequence of images of the person, and that…
In this demonstration we present work in our Webclopedia (Hovy et al. 2000, 2001) project on semantics-based answer pinpointing. Through a live interface, users can type in their questions in the query window or select a TREC10 question. The system will then parse the question…
This paper describes the multi-document text summarization system NeATS. Using a simple algorithm, NeATS was among the top two performers of the DUC-01 evaluation.
A motion-based, correspondence-free technique for human gait recognition in monocular video is presented. We contend that the planar dynamics of a walking person are encoded in a 2D plot consisting of the pairwise image similarities of the sequence of im- ages of the person, and…
Stereo matching is one of the most active research areas in computer vision. While a large number of algorithms for stereo correspondence have been developed, relatively little work has been done on characterizing their performance. In this paper, we present a taxonomy of dense, two-frame…
Newly available high quality inexpensive digital 1394 cameras enable cheap and easy construction of omnidirectional cameras. We address several important issues for creating real-time panoramas, including user-assisted focusing, devignetting, and computer controlled brightness, contrast, and white balance. We demonstrate remarkable improvements in panoramic image quality…
This paper describes recent development in the Webclopedia QA system, focusing on the use of knowledge resources such as WordNet and a QA typology to improve the basic operations of candidate answer retrieval, ranking, and answer matching.
Introduction: Accurate Measurements from Images. Why use Vision? Why is Visual Metrology Hard? Applications and Examples. Summary.- Related Work: Introduction. Using Images for Measuring and Reconstruction.- Background Geometry and Notation: Introduction. Notation. Camera Models and Perspective Mappings. Radial Distortion Correction. Vanishing Points and Vanishing Lines.…
