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How do you change the zoom on social media videos? 

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Open accessJournal ArticleDOI
Lei Li, Di Wang, Chao Liu, Qiong-Hua Wang 
08 Aug 2016-Optics Express
26 Citations
We report an ultrathin zoom telescopic objective that can achieve continuous zoom change and has reduced compact volume.
Journal ArticleDOI
Sung Chan Park, Robert R. Shannon 
40 Citations
As a result, we obtain a zoom system useful in video zoom camera employing the rear focus method.
In this paper, we propose novel approaches to determine these parameters by estimating continuous models of their variations as the focus and the zoom change.
In this paper, we propose a video-zoom driven audio-zoom algorithm in order to provide audio zooming effects in accordance with the degree of video-zoom.
Our results show that the zoom lens distortion model can accurately represent the radial distortion of a zoom lens.
The proposed zoom system has potential to take place of conventional zoom systems.
On average, ZOOM can improve 30% performance gain comparing to the state-of-art algorithms.
Proceedings ArticleDOI
Rong Jin, Yanjun Qi, Alexander G. Hauptmann 
11 Aug 2002
29 Citations
We propose a new probabilistic model for detecting zoom-in/zoom-out operations.