Illumination-Guided Video Composition via Gradient Consistency Optimization

2019 ◽  
Vol 28 (10) ◽  
pp. 5077-5090
Author(s):  
Jingye Wang ◽  
Bin Sheng ◽  
Ping Li ◽  
Yuxi Jin ◽  
David Dagan Feng
Keyword(s):  
2017 ◽  
Vol 11 (01) ◽  
pp. 65-84 ◽  
Author(s):  
Denny Stohr ◽  
Iva Toteva ◽  
Stefan Wilk ◽  
Wolfgang Effelsberg ◽  
Ralf Steinmetz

Instant sharing of user-generated video recordings has become a widely used service on platforms such as YouNow, Facebook.Live or uStream. Yet, providing such services with a high QoE for viewers is still challenging, given that mobile upload speed and capacities are limited, and the recording quality on mobile devices greatly depends on the users’ capabilities. One proposed solution to address these issues is video composition. It allows to switch between multiple recorded video streams, selecting the best source at any given time, for composing a live video with a better overall quality for the viewers. Previous approaches have required an in-depth visual analysis of the video streams, which usually limited the scalability of these systems. In contrast, our work allows the stream selection to be realized solely on context information, based on video- and service-quality aspects from sensor and network measurements. The implemented monitoring service for a context-aware upload of video streams is evaluated in different network conditions, with diverse user behavior, including camera shaking and user mobility. We have evaluated the system’s performance based on two studies. First, in a user study, we show that a higher efficiency for the video upload as well as a better QoE for viewers can be achieved when using our proposed system. Second, by examining the overall delay for the switching between streams based on sensor readings, we show that a composition view change can efficiently be achieved in approximately four seconds.


2019 ◽  
Vol 21 (12) ◽  
pp. 3095-3105 ◽  
Author(s):  
Shan An ◽  
Si Liu ◽  
Zhibiao Huang ◽  
Guangfu Che ◽  
Qian Bao ◽  
...  

Author(s):  
Yan Grunenberger ◽  
Phuong Hoang Nguyen ◽  
Gilles Privat ◽  
Jozef Hatala ◽  
Pascal Sicard

2013 ◽  
Vol 22 (7) ◽  
pp. 2532-2544 ◽  
Author(s):  
Tao Chen ◽  
Jun-Yan Zhu ◽  
A. Shamir ◽  
Shi-Min Hu

2013 ◽  
Vol 15 (3) ◽  
pp. 521-534 ◽  
Author(s):  
Qiang Chen ◽  
Meng Wang ◽  
Zhongyang Huang ◽  
Yang Hua ◽  
Zheng Song ◽  
...  
Keyword(s):  

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