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标题:Hierarchical Surface Prediction for 3D Object Reconstruction
作者:Christian Häne, Shubham Tulsiani, Jitendra Malik
来源:3dv 2017 ( International Conference on 3D Vision)
播音员:水蘸墨
编译:陈世浪 周平
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摘要
近年来,卷积神经网络在三维几何预测中已经取得了可喜的成果。卷积神经网可以从非常小的输入数据(例如单色图像)进行预测。卷积神经网络的一个主要限制是只能预测一个粗分辨率的体素网格,而不能很好的显示物体表面。
本文提出了一个通用的框架,称为层次表面预测(HSP),这有助于预测高分辨率的体素网格。这种框架能对高分辨率体素网格的表面能有一个很好的预测。对象的外部和内部可以用粗分辨率体素表示。我们的方法不依赖于特定的输入数据类型。
文中结果展示了彩色图和深度图的几何预测,还有根据部分体素网格进行形状重现。我们的分析表明我们方法中的高分辨率预测比低分辨率预测更准确。
下图是本文所提出的框架的概览:
不同像素精度的效果图:
Abstract
Recently, Convolutional Neural Networks have shown promising results for 3D geometry prediction. They can make predictions from very little input data such as a single color image. A major limitation of such approaches is that they only predict a coarse resolution voxel grid, which does not capture the surface of the objects well. We propose a general framework, called hierarchical surface prediction (HSP), which facilitates prediction of high resolution voxel grids. The main insight is that it is sufficient to predict high resolution voxels around the predicted surfaces. The exterior and interior of the objects can be represented with coarse resolution voxels.Our approach is not dependent on a specific input type. We show results for geometry prediction from color images, depth images and shape completion from partial voxel grids. Our analysis shows that our high resolution predictions are more accurate than low resolution predictions.
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