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Background Inpainting for Videos with Dynamic Objects and a Free-moving Camera

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Published on Oct 17, 2012

We propose a method for removing marked dynamic objects from videos captured with a free-moving camera, so long as the objects occlude parts of the scene with a static background. Our approach takes as input a video, a mask marking the object to be removed, and a mask marking the dynamic objects to remain in the scene. To inpaint a frame, we align other candidate frames in which parts of the missing region are visible. Among these candidates, a single source is chosen to fill each pixel so that the final arrangement is color-consistent. Intensity differences between sources are smoothed using gradient domain fusion. Our frame alignment process assumes that the scene can be approximated using piecewise planar geometry: A set of homographies is estimated for each frame pair, and one each is selected for aligning pixels such that the color-discrepancy is minimized and the epipolar constraints are maintained. We provide experimental validation with several real-world video sequences to demonstrate that, unlike in previous work, inpainting videos shot with free-moving cameras does not necessarily require estimation of absolute camera positions and per-frame per-pixel depth maps.

Reference: Miguel Granados, Kwang In Kim, James Tompkin, Jan Kautz, Christian Theobalt. Background Inpainting for Videos with Dynamic Objects and a Free-moving Camera. In Proc. European Conference in Computer Vision (ECCV). 2012.

Project page: http://www.mpi-inf.mpg.de/~granados/p...

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