首页> 外文会议>European Conference on Computer Vision(ECCV 2004) pt.4; 20040511-20040514; Prague; CZ >Shape and View Independent Reflectance Map from Multiple Views
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Shape and View Independent Reflectance Map from Multiple Views

机译:从多个视图塑造和查看独立的反射率贴图

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We consider the problem of estimating the 3D shape and reflectance properties of an object made of a single material from a calibrated set of multiple views. To model reflectance, we propose a View Independent Reflectance Map (VIRM) and derive it from Torrance-Sparrow BRDF model. Reflectance estimation then amounts to estimating VIRM parameters. We represent object shape using surface trian-gulation. We pose the estimation problem as one of minimizing cost of matching input images, and the images synthesized using shape and reflectance estimates. We show that by enforcing a constant value of VIRM as a global constraint, we can minimize the matching cost function by iterating between VIRM and shape estimation. Experiment results on both synthetic and real objects show that our algorithm is effective in recovering the 3D shape as well as non-lambertian reflectance information. Our algorithm does not require that light sources be known or calibrated using special objects, thus making it more flexible than other photometric stereo or shape from shading methods. The estimated VIRM can be used to synthesize views of other objects.
机译:我们考虑了一个问题,即从一组经过校准的多个视图中估计由一种材料制成的对象的3D形状和反射特性。为了建立反射模型,我们提出了独立于视图的反射图(VIRM),并从Torrance-Sparrow BRDF模型中得出。然后,反射率估算等于估算VIRM参数。我们使用表面三角剖分表示对象的形状。我们将估计问题摆在最小化匹配输入图像以及使用形状和反射率估计合成图像的成本之一上。我们表明,通过将VIRM的恒定值强制为全局约束,可以通过在VIRM和形状估计之间进行迭代来最小化匹配成本函数。在合成对象和真实对象上的实验结果表明,我们的算法可有效地恢复3D形状以及非朗伯反射率信息。我们的算法不需要使用特殊物体来知道或校准光源,因此使其比其他光度立体或阴影方法的形状更灵活。估计的VIRM可用于合成其他对象的视图。

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