نتایج جستجو برای: key frame

تعداد نتایج: 646603  

2004
J. Calic B. T. Thomas

Though being a vital part of video indexing and retrieval systems, key-frame extraction algorithms have been based mainly on the analysis of various frame similarities and their later clustering. This work broadens the spectra of the analysis by focusing on the spatio-temporal region relations present in the scene to determine the most representative frame in the shot. It applies efficient vide...

2007
Ugo Ciracì Marco Dalai Riccardo Leonardi

In the context of Distributed Video Coding (DVC), rate allocation among sources represents an important problem to solve. While in the information theoretical setting of Distributed Source Coding (DSC) the statistical correlation between sources is usually assumed to be known, in practical DVC systems there is no a priori knowledge of the underlying statistics of visual data. This lack of infor...

2017
Haytham Mohamed Adel Moussa Mohamed Elhabiby Naser El-Sheimy Abu Sesay

Unmanned aerial vehicles represent an effective technology for indoor search and rescue operations. Typically, most indoor missions' environments would be unknown, unstructured, and/or dynamic. Navigation of UAVs in such environments is addressed by simultaneous localization and mapping approach using either local or global approaches. Both approaches suffer from accumulated errors and high pro...

Journal: :Artif. Intell. 1997
Hideyuki Nakashima Hitoshi Matsubara Ichiro Osawa

Even we human cannot solve the frame problem, that is, we cannot completely describe conditions for a certain action to succeed, nor can we completely predict what will happen as the result of an action. Nevertheless, in daily life we can act as if there were no such problem, because we use some heuristics to bypass it. In this paper, we propose that the concept of causality is the heuristics. ...

Journal: :JSW 2010
Hao Zhang Zhijing Liu Haiyong Zhao Guojian Cheng

This paper presents a new method of human activity recognition, which is based on R transform and dynamic time warping (DTW) after the key frame is extracted from a cycle. For a key binary human silhouette, R transform is employed to represent low-level features. The advantage of the R transform lies in its low computational complexity and geometric invariance. The DTW distance based on the ext...

2004
Rajesh Narasimha Andreas E. Savakis Raghuveer M. Rao Ricardo L. de Queiroz

We present a neural network based approach to key frame extraction in the compressed domain. The proposed method is an amalgamation of both the MPEG-7 descriptors namely motion intensity descriptor and spatial activity descriptor. Shot boundary detection and block motion estimation techniques are employed prior to the extraction of the descriptors. The motion intensity (“pace of action”) is obt...

2017
Janya Sainui

As a rapid growth of digital videos and data communications, video summarization that provides a shorter version of the video for fast video browsing and retrieval is necessary. Key frame extraction is one of the mechanisms to generate video summary. In general, the extracted key frames should both represent the entire video content and contain minimum redundancy. However, most of the existing ...

Journal: :Pattern Recognition Letters 2004
Tie-Yan Liu Xu-Dong Zhang Jian Feng Kwok-Tung Lo

In this paper, the authors treat the key frame extraction problem from a viewpoint of shot reconstruction. As a result, a novel criterion called shot reconstruction degree (SRD) is proposed for key frame selection based on the degree of retaining motion dynamics of a video shot. Compared with the widely used fidelity criterion, the key frame set produced by SRD can better capture the detailed d...

2015
Sanjoy Ghatak

With the advent of the information age and an explosion in the availability of multimedia data, news video production and its usage is growing extremely. But these require more memory and space. So in order to save space and time we need to summarize video. For this we need to perform key frame extraction into the video. This project compares with each other, the combinations of existing approa...

Journal: :categories and general algebraic structures with applications 2014
john frith anneliese schauerte

this paper is a continuation of [uniformities and covering properties for partial frames (i)], in which we make use of the notion of a partial frame, which is a meet-semilattice in which certain designated subsets are required to have joins, and finite meets distribute over these. after presenting there our axiomatization of partial frames, which we call $sels$-frames, we added structure, in th...

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