The free-viewpoint videos are captured using a camera array which capture the scene from multiple viewpoints. To generate the depth information, an additional depth camera may be provided for each viewpoint of the camera array. Alternatively, depth maps can be generated at a later time using one of the known depth estimation methods [1].
References
[1] D. Scharstein and R. Szeliski. A taxonomy and evaluation of dense two-frame stereo correspondence algorithms. International Journal of Computer Vision, 47(1-3):7–42, 2002.
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