scholarly journals Video shot meta-segmentation based on multiple criteria for gradual transition detection

Author(s):  
Efthymia Tsamoura ◽  
Vasileios Mezaris ◽  
Ioannis Kompatsiaris
Author(s):  
Nandini H. M. ◽  
Chethan H. K. ◽  
Rashmi B. S.

Shot boundary detection in videos is one of the most fundamental tasks towards content-based video retrieval and analysis. In this aspect, an efficient approach to detect abrupt and gradual transition in videos is presented. The proposed method detects the shot boundaries in videos by extracting block-based mean probability binary weight (MPBW) histogram from the normalized Kirsch magnitude frames as an amalgamation of local and global features. Abrupt transitions in videos are detected by utilizing the distance measure between consecutive MPBW histograms and employing an adaptive threshold. In the subsequent step, co-efficient of mean deviation and variance statistical measure is applied on MPBW histograms to detect gradual transitions in the video. Experiments were conducted on TRECVID 2001 and 2007 datasets to analyse and validate the proposed method. Experimental result shows significant improvement of the proposed SBD approach over some of the state-of-the-art algorithms in terms of recall, precision, and F1-score.


2020 ◽  
Vol 8 (5) ◽  
pp. 4763-4769

Now days as the progress of digital image technology, video files raise fast, there is a great demand for automatic video semantic study in many scenes, such as video semantic understanding, content-based analysis, video retrieval. Shot boundary detection is an elementary step for video analysis. However, recent methods are time consuming and perform badly in the gradual transition detection. In this paper we have projected a novel approach for video shot boundary detection using CNN which is based on feature extraction. We designed couple of steps to implement this method for automatic video shot boundary detection (VSBD). Primarily features are extracted using H, V&S parameters based on mean log difference along with implementation of histogram distribution function. This feature is given as an input to CNN algorithm which detects shots which is based on probability function. CNN is implemented using convolution and rectifier linear unit activation matrix which is followed after filter application and zero padding. After downsizing the matrix it is given as a input to fully connected layer which indicates shot boundaries comparing the proposed method with CNN method based on GPU the results are encouraging with substantially high values of precision Recall & F1 measures. CNN methods perform moderately better for animated videos while it excels for complex video which is observed in the results.


2012 ◽  
pp. 4-31 ◽  
Author(s):  
D. North ◽  
J. Wallis ◽  
S. Webb ◽  
B. Weingast

The paper presents a summary of the forthcoming book by the authors and discusses the sample study of the 9 developing countries. While admitting the non-linearity of economic development they claim that the developing countries make a transition from the limited access orders (where the coalition of powerful elite groups plays a major role, that is based on personal connections and hampers free political and economic competition) to the open access orders with democratic government and efficient decentralized economic system. The major conclusion of this article is that what the limited access societies should do is not simply introducing open access institutions, but reorganizing the incentives of the elites so that to limit violence, provide economic and political stability and make a gradual transition to the open access order beneficial for the elites.


2014 ◽  
Vol 11 (1) ◽  
pp. 11-22 ◽  
Author(s):  
Jonathan Chaloff

The growing complexity of selection criteria for discretionary labour migration in OECD countries has been accompanied by an expanded demand for labour market analysis and consultation with stakeholders. While some features of general or detailed criteria may be fixed in legislation, numerical quotas or targets, shortage lists, and multiple-criteria points-based systems are generally subject to periodic review and revision based on labour market data and consultation with stakeholders. Official government bodies have maintained co-ordination of this process, with varying degrees of externalization. In most countries expertise is internal, with recourse to external mandated bodies rare. In almost all cases, however, the process is designed to promote consensus around the policy while maintaining political control.


Asian Survey ◽  
1983 ◽  
Vol 23 (2) ◽  
pp. 201-207
Author(s):  
Chan Heng Chee
Keyword(s):  

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