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Layered shape synthesis

机译:分层形状合成

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Many inhomogeneous real-world textures are non-stationary and exhibit various large scale patterns that are easily perceived by a human observer. Such textures violate the assumptions underlying most state-of-the-art example-based synthesis methods. Consequently, they cannot be properly reproduced by these methods, unless a suitable control map is provided to guide the synthesis process. Such control maps are typically either user specified or generated by a simulation. In this paper, we present an alternative: a method for automatic example-based generation of control maps, geared at synthesis of natural, highly inhomogeneous textures, such as those resulting from natural aging or weathering processes. Our method is based on the observation that an appropriate control map for many of these textures may be modeled as a superposition of several layers, where the visible parts of each layer are occupied by a more homogeneous texture. Thus, given a decomposition of a texture exemplar into a smallnumber of such layers, we employ a novel example-based shape synthesis algorithm to automatically generate a new set of layers. Our shape synthesis algorithm is designed to preserve both local and global characteristics of the exemplar's layer map. This process results in a new control map, which then may be used to guide the subsequent texture synthesis process.
机译:许多不均匀的真实世界纹理是不平稳的,并呈现出各种大型图案,人类观察者很容易察觉。这种纹理违反了大多数基于最新技术的基于示例的合成方法的假设。因此,除非提供适当的控制图来指导合成过程,否则无法通过这些方法正确复制它们。这样的控制图通常是用户指定的或由仿真生成的。在本文中,我们提出了一种替代方法:一种基于示例的自动生成控制图的方法,旨在合成自然的,高度不均匀的纹理,例如由自然老化或风化过程产生的纹理。我们的方法基于这样的观察:对于许多这些纹理,适当的控制图可以建模为几层的叠加,其中每层的可见部分被更均匀的纹理占据。因此,在将纹理样本分解为少量此类层的情况下,我们采用了基于示例的新颖形状合成算法来自动生成一组新层。我们的形状合成算法旨在保留示例图层图的局部和全局特征。该过程产生新的控制图,然后可以将其用于指导后续的纹理合成过程。

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