Abstract:

Light field cameras have many advantages over traditional cameras, as they allow the user to change various camera settings after capture. However, capturing light fields requires a huge bandwidth to record the data: a modern light field camera can only take three images per second. This prevents current consumer light field cameras from capturing light field videos. Temporal interpolation at such extreme scale (10x, from 3 fps to 30 fps) is infeasible as too much information will be entirely missing between adjacent frames. Instead, we develop a hybrid imaging system, adding another standard video camera to capture the temporal information. Given a 3 fps light field sequence and a standard 30 fps 2D video, our system can then generate a full light field video at 30 fps. We adopt a learning-based approach, which can be decomposed into two steps: spatio-temporal flow estimation and appearance estimation. The flow estimation propagates the angular information from the light field sequence to the 2D video, so we can warp input images to the target view. The appearance estimation then combines these warped images to output the final pixels. The whole process is trained end-to-end using convolutional neural networks. Experimental results demonstrate that our algorithm outperforms current video interpolation methods, enabling consumer light field videography, and making applications such as refocusing and parallax view generation achievable on videos for the first time.

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	Code 46 MB		LF Viewer 10 MB		Dataset 18.4 GB

© held by Owner/Author 2017. This is the author's version of the work. It is posted here for your personal use. Not for redistribution. The definitive Version of Record was published in ACM TOG and can be accessed through External URL.

Bibtex

@article{wang2017light,
    author  = {Ting-Chun Wang and Jun-Yan Zhu and Nima Khademi Kalantari and
               Alexei A. Efros and Ravi Ramamoorthi},
    title   = {Light Field Video Capture Using a Learning-Based Hybrid Imaging System},
    journal = {ACM Transactions on Graphics (Proceedings of SIGGRAPH 2017)},
    volume  = {36},
    number  = {4},
    year    = {2017},
}