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Wavelet-based joint estimation and encoding of depth-image-based representations for free-viewpoint rendering
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DOI：10.1109/TIP.2008.922425.png)
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We propose a wavelet-based codec for the static depth-image-based representation, which allows viewers to freely choose the viewpoint. The proposed codec jointly estimates and encodes the unknown depth map from multiple views using a novel rate-distortion (RD) optimization scheme. The rate constraint reduces the ambiguity of depth estimation by favoring piece-wise-smooth depth maps. The optimization is efficiently solved by a novel dynamic programming along trees of integer wavelet coefficients. The codec encodes the image and the depth map jointly to decrease their redundancy and to provide a RD-optimized bitrate allocation between the two. The codec also offers scalability both in resolution and in quality. Experiments on real data show the effectiveness of the proposed codec.
Keyword:
depth estimation
depth-image-based representation (DIBR)
free-viewpoint rendering
image-based rendering
joint coding
rate-distortion optimization
scalable coding
3-D TV
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期刊
IF:
13.7
论文数:
1.0W
被引数:
8.4W
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