Comparison of Depth Super-Resolution Methods for 2 D / 3 D Images
Comparison of Depth Super-Resolution Methods for 2 D / 3 D Images
复制标题
DOI：
--
复制
发表时间：
2011
期刊：
影响因子：
--
通讯作者：
B. Langmann;K. Hartmann;O. Loffeld
中科院分区：
文献类型：
--
作者：
B. Langmann;K. Hartmann;O. Loffeld
几年来，已经有能够通过飞行时间原理提供从PMD芯片获得的深度值的相机。最近，已经开发出在单目设置中将正常颜色芯片与这种PMD芯片组合的相机。这些2D/3D相机的一个缺点是，由于当前PMD芯片的有限分辨率，深度图像的分辨率远低于彩色图像的分辨率。这适用于PMD相机和普通相机一起使用时。然而，对于某些应用，期望高分辨率深度图像。彩色图像可用于生成高分辨率深度图像，其比用普通缩放方法产生的深度图像更接近地面实况。交叉双边滤波是一种广泛应用的彩色和深度图像融合方法，这种相当通用的方法被采用在几种方法中。本文从理论和实践两个方面对不同的双边滤波策略进行了比较，并着重讨论了其迭代应用。基于成本量或马尔可夫随机场的类似方法也得到了解决。
For a few years cameras have been available which are able to provide depth values gained from a PMD chip through the Time-of-Flight principle. Recently, cameras combining a normal color chip with such a PMD chip in a monocular setup have been developed. One drawback of these 2D/3D cameras is that the resolution of the depth images is much lower than those of the color images due to the limited resolution of current PMD chips. This holds true whenever PMD cameras and normal cameras are used together. However, for certain applications high resolution depth images are desirable. The color images can be utilized to generate high resolution depth images which are closer to the ground truth than the depth images produced with common scaling methods. A widely spread method to fuse the color and depth images is cross bilateral filtering and this rather general method is adopted in several approaches. In this paper different bilateral filtering strategies are compared in theory as well as in practice and especially the iterative application is addressed. Similar approaches based on a cost volume or on Markov Random Fields are addressed additionally.