NDLI: Towards perceptual video cropping with curve fitting

Content Provider	Springer Nature Link
Author	Liu, Di Wu, Zhaogai Lin, Xianming Ji, Rongrong
Copyright Year	2014
Abstract	Coming with the proliferation of mobile devices, the issue of displaying videos with varying resolutions and aspect ratios has become emerging. To this end, state-of-the-art works typically resort to video retargeting or cropping, i.e. adaptively adjusting the display regions and contents within each video frame to fit for the mobile device screens. However, most existing approaches retain on evaluating the objective visual statistics to select salient parts to be cropped within each frame, with time-consuming constraints to ensure the temporal consistency, which is indeed unsuitable to cope with the massive videos uploaded daily from user-contributed platforms. In this paper, we propose an efficient yet robust video cropping algorithm which merits in two-fold: First, a perceptual Region of Interest selection approach is proposed by employing a novel Interesting Region Score, which is a linear combination of Rate of Focused Attention, Total Saliency Score, and Bias from Center Penalty. Second, we adopt fast curve fitting to seek for an optimal cropping sequence over a set of consecutive video frames within a shot, which avoids the complex optimization with temporal constraints among adjacent frames. Experiments on video sequences from Backkom cartoon and Iron Man II with comparisons against several alternative approaches demonstrate the efficiency and robustness of the proposed algorithm.
Starting Page	12465
Ending Page	12475
Page Count	11
File Format	PDF
ISSN	13807501
Journal	Multimedia Tools and Applications
Volume Number	75
Issue Number	20
e-ISSN	15737721
Language	English
Publisher	Springer US
Publisher Date	2014-10-15
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Video cropping Curve fitting Interesting region score Multimedia Information Systems Computer Communication Networks Data Structures, Cryptology and Information Theory Special Purpose and Application-Based Systems
Content Type	Text
Resource Type	Article
Subject	Computer Networks and Communications Hardware and Architecture Software Media Technology

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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