The paper presents experimental results for the detection of related video streams (views) of multi camera system using MPEG−7 visual signature tools. This detection can be used for identification of video streams stored in video repositories which constitute the same multi camera recording set. Two signature tools have been investigated: Image Signature descriptor and Video Signature descripto...

This paper introduces a novel method for analyzing video records which contain personal activities captured by a head-mounted camera. This aims to support the user to retrieve the most important or relevant portions from the videos. For this purpose, we use the user’s behaviors which appear when he/she pays attention to something. We define two types of those behaviors, one of which is “gaze at...

This paper describes a scheme for modelling and tracking the motion of articulated bodies using a number of video cameras. The aim is to obtain complete and accurate information on the three-dimensional location and motion of the bodies over time. Applications include medicine, sports analysis and motion capture for animation. Feature extraction is avoided by placing markers at the joints of th...

We report an autonomous surveillance system with multiple pan-tilt-zoom (PTZ) cameras assisted by a fixed wide-angle camera. The wide-angle camera provides large but low resolution coverage and detects and tracks all moving objects in the scene. Based on the output of the wide-angle camera, the system generates spatiotemporal observation requests for each moving object, which are candidates for...

In this paper we present a new metric camera self-calibration algorithm that does not require the global minimization of an error function and can produce all legal solutions to the three-camera self-calibration problem in a single pass. By contrast, virtually all previous self-calibration algorithms rely on nonlinear global optimization unless special assumptions are made about the camera or i...

Object recognition depends on the seen views of objects. These views depend in part on the perceivers' own actions as they select and show object views to themselves. The self-selection of object views from manual exploration of objects during infancy and childhood may be particularly informative about the human object recognition system and its development. Here, we report for the first time o...

Gait has been shown to be an efficient biometric feature for human identification at a distance from a camera. However, performance of gait recognition can be affected by various problems. One of the serious problems is view change which can be caused by change of walking direction and/or change of camera viewpoint. This leads to a consequent difficulty of across-view gait recognition where pro...

Camera calibration is the process of estimating the parameters of the camera. There are two sets of parameters for a camera: intrinsic parameters, and extrinsic parameters. It is generally assumed that we know the coordinates of a set of points in the world reference frame and their corresponding points in one or more images. The notations used and the general problem of calibration is describe...

We present a technique for camera calibration and Euclidean reconstruction from multiple images of the same scene. Unlike standard Tsai's camera calibration from a known scene, we exploited controlled known motions of the camera to obtain its calibration and Euclidean reconstruction without any knowledge about the scene. We consider three linearly independent translations of an uncalibrated cam...

The notation and terminology used in this paper are introduced in the following articles: [16], [13], [2], [3], [5], [1], [7], [9], [12], [10], [8], [18], [14], [11], [6], [15], and [17]. For simplicity, we use the following convention: x, r, a, x0, p are real numbers, n, i, m are elements of N, Z is an open subset of R, and f , f1, f2 are partial functions from R to R. Next we state a number o...