Zhou Kun, Du Peng, Wang Lifeng, Matsushita Yasuyuki, Shi Jiaoying, Guo Baining, Shum Heung-Yeung
Microsoft Research Asia, 3F, Beijing Sigma Center, No. 49, Zhichun Road, Haidian District, Beijing 100080, PRC.
IEEE Trans Vis Comput Graph. 2005 Sep-Oct;11(5):519-28. doi: 10.1109/TVCG.2005.78.
We present a system for decorating arbitrary surfaces with bidirectional texture functions (BTF). Our system generates BTFs in two steps. First, we automatically synthesize a BTF over the target surface from a given BTF sample. Then, we let the user interactively paint BTF patches onto the surface such that the painted patches seamlessly integrate with the background patterns. Our system is based on a patch-based texture synthesis approach known as quilting. We present a graphcut algorithm for BTF synthesis on surfaces and the algorithm works well for a wide variety of BTF samples, including those which present problems for existing algorithms. We also describe a graphcut texture painting algorithm for creating new surface imperfections (e.g., dirt, cracks, scratches) from existing imperfections found in input BTF samples. Using these algorithms, we can decorate surfaces with real-world textures that have spatially-variant reflectance, fine-scale geometry details, and surfaces imperfections. A particularly attractive feature of BTF painting is that it allows us to capture imperfections of real materials and paint them onto geometry models. We demonstrate the effectiveness of our system with examples.
我们提出了一种使用双向纹理函数（BTF）对任意表面进行装饰的系统。我们的系统分两步生成BTF。首先，我们从给定的BTF样本中自动在目标表面上合成一个BTF。然后，我们让用户以交互方式将BTF补丁绘制到表面上，使绘制的补丁与背景图案无缝融合。我们的系统基于一种称为拼接的基于补丁的纹理合成方法。我们提出了一种用于在表面上进行BTF合成的图割算法，该算法对于各种BTF样本都能很好地工作，包括那些给现有算法带来问题的样本。我们还描述了一种图割纹理绘制算法，用于根据输入BTF样本中发现的现有瑕疵创建新的表面瑕疵（如污垢、裂缝、划痕）。使用这些算法，我们可以用具有空间变化反射率、精细尺度几何细节和表面瑕疵的真实世界纹理来装饰表面。BTF绘制的一个特别吸引人的特点是它允许我们捕捉真实材料的瑕疵并将其绘制到几何模型上。我们通过示例展示了我们系统的有效性。
