首页> 外文会议>European Conference on Computer Vision(ECCV 2004) pt.4; 20040511-20040514; Prague; CZ >High Accuracy Optical Flow Estimation Based on a Theory for Warping
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High Accuracy Optical Flow Estimation Based on a Theory for Warping

机译:基于翘曲理论的高精度光流估计

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We study an energy functional for computing optical flow that combines three assumptions: a brightness constancy assumption, a gradient constancy assumption, and a discontinuity-preserving spatio-temporal smoothness constraint. In order to allow for large displacements, linearisations in the two data terms are strictly avoided. We present a consistent numerical scheme based on two nested fixed point iterations. By proving that this scheme implements a coarse-tofine warping strategy, we give a theoretical foundation for warping which has been used on a mainly experimental basis so far. Our evaluation demonstrates that the novel method gives significantly smaller angular errors than previous techniques for optical flow estimation. We show that it is fairly insensitive to parameter variations, and we demonstrate its excellent robustness under noise.
机译:我们研究了一种用于计算光流的能量函数,该函数结合了三个假设:亮度恒定假设,梯度恒定假设和保留不连续性的时空平滑度约束。为了允许大位移,严格避免两个数据项中的线性化。我们提出了基于两个嵌套定点迭代的一致数值方案。通过证明该方案实现了从粗到细的翘曲策略,我们为翘曲提供了理论基础,到目前为止,翘曲已主要用于实验。我们的评估表明,与先前的光流估计技术相比,该新方法所提供的角度误差要小得多。我们表明它对参数变化相当不敏感,并且证明了它在噪声下的出色鲁棒性。

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