Focal Flow: Measuring Distance and Velocity with Defocus and Differential Motion
Focal Flow: Measuring Distance and Velocity with Defocus and Differential Motion
复制标题
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:
影响因子:
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通讯作者:
Todd E. Zickler
中科院分区:
文献类型:
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作者:
Emma Alexander;Qi Guo;S. Koppal;S. Gortler;Todd E. Zickler
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:
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影响因子:
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作者:
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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:
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作者:
H. Farid;Eero P. Simoncelli
通讯作者:
H. Farid;Eero P. Simoncelli