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In order to compress omnidirectional video clips, a projection onto a two-dimensional image plane is necessary. The most commonly used projection format is the equirectangular panoramic projection, which results into a significant amount of redundant samples in the polar areas. The redundant samples incur extra bitrate and increase the encoding/decoding time. In this paper, we study regional down-sampling...
In this paper, we propose a content-adaptive pre-processing for downsampling depth map for 3D multiview plus depth video coding. The proposed scheme takes advantage of spatially varying content of depth maps and targets improved encoding performance. The key idea is to divide the video frames into several horizontal and vertical stripes and downsample each of them with an appropriate downsampling...
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