نتایج جستجو برای: parallax

تعداد نتایج: 2985  

2008
FABRIZIO SANTINI Michele Rucci

Motion parallax, the relative motion of 3D space at different distances experienced by a moving agent, is one of the most informative cues. While motion parallax is typically investigated during navigation, it also occurs in most robotic head/eye systems during rotations of the cameras. In these systems, as in the eyes of many species, the optical nodal points do not lie on the axes of rotation...

1996
Michal Irani P. Anandan David Sarno

We present a geometric relationship between the image motion of pairs of points over multiple frames. This relationship is based on the parallax displacements of points with respect to an arbitrary planar surface, and does not involve epipolar geometry. A constraint is derived over two frames for any pair of points, relating their projective structure (with respect to the plane) based only on t...

2004
S. E. Schröder

We compare the absolute visual magnitude of the majority of bright O stars in the sky as predicted from their spectral type with the absolute magnitude calculated from their apparent magnitude and the Hipparcos parallax. We find that many stars appear to be much fainter than expected, up to five magnitudes. We find no evidence for a correlation between magnitude differences and the stellar rota...

2009
Todd Templeton

Accurate Real-Time Reconstruction of Distant Scenes Using Computer Vision: The Recursive Multi-Frame Planar Parallax Algorithm by Todd Russell Templeton Doctor of Philosophy in Engineering-Electrical Engineering and Computer Sciences University of California, Berkeley Professor S. Shankar Sastry, Chair In this dissertation, we detail the Recursive Multi-Frame Planar Parallax (RMFPP) algorithm, ...

2016
S. Calchi Novati G. Scarpetta

Motivated by the ongoing Spitzer observational campaign, and the forecoming K2 one, we revisit, working in an heliocentric reference frame, the geometrical foundation for the analysis of the microlensing parallax, as measured with the simultaneous observation of the same microlensing event from two observers with relative distance of order AU. For the case of observers at rest we discuss the we...

Journal: :J. Electronic Imaging 2014
Andrew Jones Koki Nagano Jing Liu Jay Busch Xueming Yu Mark T. Bolas Paul E. Debevec

We present a technique for achieving tracked vertical parallax for multiple users using a variety of autostereoscopic projector array setups, including frontand rear-projection and curved display surfaces. This hybrid parallax approach allows for immediate horizontal parallax as viewers move left and right and tracked parallax as they move up and down, allowing cues such as three-dimensional (3...

2010
Ricardo Jota Miguel A. Nacenta Joaquim A. Jorge M. Sheelagh T. Carpendale Saul Greenberg

Ray pointing techniques such as laser pointing have long been proposed as a natural way to interact with large and distant displays. However we still do not understand the differences between ray pointing alternatives and how they are affected by the large size of modern displays. We present a study where four different variants of ray pointing are tested for horizontal targeting, vertical targ...

Journal: :Vision Research 2006
Mark F. Bradshaw Paul B. Hibbard Andrew D. Parton David Rose Keith Langley

Binocular disparity and motion parallax provide information about the spatial structure and layout of the world. Descriptive similarities between the two cues have often been noted which have been taken as evidence of a close relationship between them. Here, we report two experiments which investigate the effect of surface orientation and modulation frequency on (i) a threshold detection task a...

1996
Ari Buchalter

The parallax effect in ground-based microlensing (ML) observations consists of a distortion to the standard ML light curve arising from the Earth’s orbital motion. This can be used to partially remove the degeneracy among the system parameters in the event timescale, t0. In most cases, the resolution in current ML surveys is not accurate enough to observe this effect, but parallax could conceiv...

Journal: :Journal of vision 2011
Ahmad Yoonessi Curtis L Baker

Relative image motion resulting from active movement of the observer could potentially serve as a powerful perceptual cue, both for segmentation of object boundaries and for depth perception. To examine the perceptual role of motion parallax from shearing motion, we measured human performance in three psychophysical tasks: segmentation, depth ordering, and depth magnitude estimation. Stimuli co...

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