Maitre Matthieu, Shinagawa Yoshihisa, Do Minh N
Windows Experience Group, Microsoft, Redmont, WA 98052, USA.
IEEE Trans Image Process. 2008 Jun;17(6):946-57. doi: 10.1109/TIP.2008.922425.
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 piecewise-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.
我们提出了一种基于小波的编解码器，用于基于静态深度图像的表示，该表示允许观看者自由选择视点。所提出的编解码器使用一种新颖的率失真（RD）优化方案，从多个视图联合估计并编码未知深度图。率约束通过支持分段平滑深度图来减少深度估计的模糊性。通过一种沿整数小波系数树的新颖动态规划有效地解决了优化问题。该编解码器对图像和深度图进行联合编码，以减少它们的冗余，并在两者之间提供RD优化的比特率分配。该编解码器还在分辨率和质量方面提供可扩展性。对真实数据的实验表明了所提出编解码器的有效性。
