Smart Beholder: An Open-Source Smart Lens for Mobile Photography

Smart lenses are detachable lenses connected to mobile devices via wireless networks, which are not constrained by the small form factor of mobile devices, and have potential to deliver better photo (video) quality. However, the viewfinder previews of smart lenses on mobile devices are difficult to optimize, due to the strict resource constraints on smart lenses and fluctuating wireless network conditions. In this paper, we design, implement, and evaluate an opensource smart lens, called Smart Beholder. It achieves three design goals: (i) cost effectiveness, (ii) low interaction latency, and (iii) high preview quality by: (i) selecting an embedded system board that is just powerful enough, (ii) minimizing per-component latency, and (iii) dynamically adapting the video coding parameters to maximizing Quality of Experience (QoE), respectively. Several optimization techniques, such as anti-drifting mechanism for video frames and QoE-driven resolution/frame rate adaptation algorithm, a...

• Type: Journal
• Year: 2015
• Where: MM
• Authors: Chun-Ying Huang, Chih-Fan Hsu, Tsung-Han Tsai, Ching-Ling Fan, Cheng-Hsin Hsu, Kuan-Ta Chen
• Keywords: MM 2015, Multimedia