Focal Flow: Measuring Distance and Velocity with Defocus and Differential Motion

Focal Flow: Measuring Distance and Velocity with Defocus and Differential Motion
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焦流:通过散焦和微分运动测量距离和速度

DOI:
10.1007/978-3-319-46487-9_41
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发表时间:
2016
期刊:
Proceedings of IEEE Computer Society Conference on Computer Vision and Pattern Recognition
影响因子:
--
通讯作者:
Todd E. Zickler
Todd E. Zickler
中科院分区:
--
文献类型:
--
作者:
Emma Alexander;Qi Guo;S. Koppal;S. Gortler;Todd E. Zickler

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我们提出了焦点流量传感器。这是一个非驱动的单目相机,同时利用离焦和微分运动来测量深度图和3D场景速度场。它使用类似于光流的逐像素线性约束,将图像导数与深度和速度联系起来。我们推导了这一约束,证明了它对场景纹理的不变性,并证明了只有当传感器的模糊核为高斯时才完全满足这一约束。分析了理想焦流传感器的固有灵敏度,搭建了样机并进行了测试。实验为更广泛的一组孔径配置提供了有用的深度和速度信息,包括一个具有丸状孔径的简单透镜。
We present the focal flow sensor. It is an unactuated, monocular camera that simultaneously exploits defocus and differential motion to measure a depth map and a 3D scene velocity field. It does so using an optical-flow-like, per-pixel linear constraint that relates image derivatives to depth and velocity. We derive this constraint, prove its invariance to scene texture, and prove that it is exactly satisfied only when the sensor’s blur kernels are Gaussian. We analyze the inherent sensitivity of the ideal focal flow sensor, and we build and test a prototype. Experiments produce useful depth and velocity information for a broader set of aperture configurations, including a simple lens with a pillbox aperture.
DOI: 10.1007/978-3-540-89393-6
发表时间: 2010
期刊: --
影响因子: --
作者:
Download Here
通讯作者: Download Here
DOI: 10.1364/josaa.15.001777
发表时间: 1998
期刊: Journal of the Optical Society of America. A, Optics, image science, and vision
影响因子: --
作者:
H. Farid;Eero P. Simoncelli
通讯作者: H. Farid;Eero P. Simoncelli