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The Scientific World Journal
Volume 2013 (2013), Article ID 293681, 15 pages
http://dx.doi.org/10.1155/2013/293681
Research Article

Low-Complexity Saliency Detection Algorithm for Fast Perceptual Video Coding

School of Electronic Information & Control Engineering, Beijing University of Technology, Beijing 100124, China

Received 27 September 2013; Accepted 5 November 2013

Academic Editors: M. Nappi and D. Tay

Copyright © 2013 Pengyu Liu and Kebin Jia. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

A low-complexity saliency detection algorithm for perceptual video coding is proposed; low-level encoding information is adopted as the characteristics of visual perception analysis. Firstly, this algorithm employs motion vector (MV) to extract temporal saliency region through fast MV noise filtering and translational MV checking procedure. Secondly, spatial saliency region is detected based on optimal prediction mode distributions in I-frame and P-frame. Then, it combines the spatiotemporal saliency detection results to define the video region of interest (VROI). The simulation results validate that the proposed algorithm can avoid a large amount of computation work in the visual perception characteristics analysis processing compared with other existing algorithms; it also has better performance in saliency detection for videos and can realize fast saliency detection. It can be used as a part of the video standard codec at medium-to-low bit-rates or combined with other algorithms in fast video coding.