JISE


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Journal of Information Science and Engineering, Vol. 28 No. 3, pp. 617-630


An Improved Sequence-to-sequence Alignment Method Combined with Feature-based Image Registration Algorithm


WEI-LONG CHEN1,2,3, XIAO-HAI HE1,+, HAI-YING SONG1 AND WEI WU1
1School of Electronics and Information Engineering 
Sichuan University 
Sichuan, 610064 P.R. China 
+E-mail: nic5602@scu.edu.cn 
2Digital Media Department 
Sichuan Normal University 
Sichuan, 610068 P.R. China 
3Visual Computing and Virtual Reality Key Laboratory of Sichuan Province 
Sichuan, 610068 P.R. China


    A feature-based sequence-to-sequence alignment method was proposed by Caspi et al., which can align multiple sequences in space-time. But this method can not be very effective and precise in spatial alignment, due to a small number of moving objects in the scene, limited coverage of the trajectories and the short temporal duration of the trajectories. In order to solve this problem, we proposed a new sequence-to-sequence alignment method, combining the method proposed by Caspi et al. with a feature-based image registration method. In this paper, we made a comparison between our method and that of Caspi et al. Experimental results show that the presented method improves alignment precision both on X-axis orientation and on Y-axis orientation. The PSNR value is approximately improved by 13.5dB. At the same time, the time needed by Our-method will be slightly increased but can be ignored. When the results of the alignment are applied in space-time super-resolution reconstruction, the effect also proves the validity of our-method.


Keywords: sequence-to-sequence alignment, image registration, super-resolution reconstruction, psnr, alignment accuracy, alignment time

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