Results 211 to 220 of about 58,505 (266)

Binocular Summation in Healthy Presbyopic Adults: Contrast Sensitivity and Defocus Curves. [PDF]

J Pers Med
García-Del-Castillo V, Alamo-Peña M, Albarrán-Diego C, Arnaiz-Schmitz C, Garzón N, García-Montero M.   +5 more
europepmc   +1 more source

Phase-based optoretinographic measurements of cones with a raster-scanning adaptive optics OCT are highly repeatable. [PDF]

Biomed Opt Express
Cai Y, Bartuzel MM, Maddipatla R, Zawadzki RJ, Jonnal RS.   +4 more
europepmc   +1 more source

Dynamic Single-Binding Event Profiling With on-Chip Microlenses for Wash-Free Digital Biosensing. [PDF]

Adv Sci (Weinh)
Zhan T, Lu L, Gu G, Zhang P, Shen J, Tan X, Ye W, Hu S, Zhang Y, Yu H, Liu S, Zheng H, Yang H.   +12 more
europepmc   +1 more source

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The Statistics of Optical Flow

Computer Vision and Image Understanding, 2001
Summary: When processing image sequences some representation of image motion must be derived as a first stage. The most often used representation is the optical flow field, which is a set of velocity measurements of image patterns. It is well known that it is very difficult to estimate accurate optical flow at locations in an image which correspond to ...
Cornelia Fermüller, David Shulman, Yiannis Aloimonos   +2 more
openaire   +2 more sources

On the Spatial Statistics of Optical Flow

International Journal of Computer Vision, 2005
We develop a method for learning the spatial statistics of optical flow fields from a novel training database. Training flow fields are constructed using range images of natural scenes and 3D camera motions recovered from handheld and car-mounted video sequences.
Stefan Roth 0001, Michael J. Black
openaire   +2 more sources

Statistics of backscattering in optical waveguides

Optics Letters, 2010
The statistics of backscattering induced by sidewall roughness in dielectric optical waveguides is experimentally investigated. We demonstrate that waveguide backscattering is a wavelength-dependent random process, whose statistics follows the rules of single scattering systems, independently of shape, size, and refractive index contrast of the ...
MORICHETTI, FRANCESCO, CANCIAMILLA, ANTONIO, MELLONI, ANDREA IVANO   +2 more
openaire   +3 more sources

Photon Statistics in Adaptive Optics

Optics and Photonics News, 1999
ABSTRACT Random aberrations due to atmospheric turbulence determine the angular resolution of ground-based telescopes. Adaptive optics systems compensate the wavefront degradation before detection. Although systems with a large number of subapertures in the wavefront sensor and of actuators in the deformable mirror provide the best results, they are ...
Vidal F. Canales, Manuel P. Cagigal
openaire   +1 more source

Statistical biases in optic flow

Proceedings. 1999 IEEE Computer Society Conference on Computer Vision and Pattern Recognition (Cat. No PR00149), 2003
The computation of optical flow from image derivatives is biased in regions of non uniform gradient distributions. A least-squares or total least squares approach to computing optic flow from image derivatives even in regions of consistent flow can lead to a systematic bias dependent upon the direction of the optic flow, the distribution of the ...
Cornelia Fermüller, Robert Pless, Yiannis Aloimonos   +2 more
openaire   +2 more sources