نتایج جستجو برای: video camera

تعداد نتایج: 221558  

Journal: :iranian journal of child neurology 0
m. mohammadi md professor of pediatric neurology, children's medical center hospital, tehran university of medical sciences

photo-albums and video-clips are simple means for diagnosis of diverseneurologic disorders in children. most families either own or can borrow a still or video camera. even when a purchase is required, it is more costeffective than brain imaging as well as other sophisticated studies, and the family has something useful to show for expenditure. on the other hand many families have a photo-album...

Journal: :Anesthesia and analgesia 2004
Thierry Girard Miodrag Filipovic

UNLABELLED The use of computers in scientific and educational presentations is rapidly increasing. As a digital presentation is ideal for showing moving images, the use of multimedia files, e.g., echocardiographic loops within these presentations, is common. Even though recent echocardiography machines store acquired data in a digital format, these data are often not readily accessible to be tr...

2008
Frédéric Devernay Olivier Faugeras

Most algorithms in 3-D Computer Vision rely on the pinhole camera model because of its simplicity, whereas video optics, especially low-cost wide-angle or fish-eye lens, generate a lot of non-linear distortion which can be critical. To find the distortion parameters of a camera, we use the following fundamental property: a camera follows the pinhole model if and only if the projection of every ...

2004
Petr Doubek Indra Geys Tomáš Svoboda Luc Van Gool

We present a camera network system consisting of several modules of 2-3 low end cameras attached to one computer. It is not possible for a human to observe all the information coming from such a network simultaneously. Our system is designed to select the best viewpoint for each part of the video sequence, thus automatically creating one real-time video stream that contains the most important d...

Journal: :Comput. Graph. Forum 2010
Marcel Germann Alexander Sorkine-Hornung Richard Keiser Remo Ziegler Stephan Würmlin Markus H. Gross

We present a novel representation and rendering method for free-viewpoint video of human characters based on multiple input video streams. The basic idea is to approximate the articulated 3D shape of the human body using a subdivision into textured billboards along the skeleton structure. Billboards are clustered to fans such that each skeleton bone contains one billboard per source camera. We ...

2007
Damien LEFLOCH Jon Y. Hardeberg Faouzi Alaya Cheikh Pierre Gouton

A people counter is a device used to count the number of pedestrians walking through a door or corridor. Most of the time, this system is used at the entrance of a building so that the total number of visitors can be recorded. People counting system is important for marketing research (pedestrian traffic management, tourists flow estimation) or in security application (in the case of an evacuat...

1999
S. Lertrattanapanich N. K. Bose

A problem of recurring interest involves the construction of a panoramic video mosaic from a video sequence generated from a camera and then obtain high resolution images of regions of interest in the mosaic. The camera motions are estimated by calculating the parameters of a projective model and then superresolution is attained by an algorithm for constructing a high resolution image from unde...

2010
Tobias Feldmann Ioannis Mihailidis Sebastian Schulz Dietrich Paulus Annika Wörner

We present an approach for video based human motion capture using a static multi camera setup. The image data of calibrated video cameras is used to generate dense volumentric reconstructions of a person within the capure volume. The 3d reconstructions are then used to fit a 3d cone model into the data utilizing the Iterative Closest Point (ICP) algorithm. We can show that it is beneficial to u...

2006
Frederic Dufaux Touradj Ebrahimi

We propose a smart camera which performs video analysis and generates an MPEG-7 compliant stream. By producing a content-based metadata description of the scene, the MPEG-7 camera extends the capabilities of conventional cameras. The metadata is then directly interpretable by a machine. This is especially helpful in a number of applications such as video surveillance, augmented reality and qual...

Journal: :journal of chemical and petroleum engineering 2011
parisa zaheri hosein abolghasemi mohammad ghannadi maragheh maryam zaheri

drop size distribution in a mixer-settler is an essential design parameter, as obtaining drop size distribution will result in optimum performance of equipment. in this paper for obtaining drop size, several experiments have been performed with a single stage horizontal mixer-settler. a video technique has been used in order to measure the drop size in the mixer-settler with the help of a digit...

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