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More specific:| » Conférences » M.Sc. | » Ph.D. » prédoc | » Journaux » Rapports techniques |
Plane-Based Calibration for Linear Cameras
Abstract Linear or 1D cameras are used in several areas such as industrial inspection and satellite imagery.Since 1D cameras consist of a linear sensor, a motion (usually perpendicular to the sensor orientation) is performed in order to acquire a full … Continue reading
Posted in ECCV, Jamil Draréni, Peter Sturm, Sébastien Roy
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Fast View Interpolation from Stereo: Simpler can be Better
In this paper, we propose to rely only on images to generate novel views, and recall why modeling of the complete scene is often too expensive in the context of view interpolation. We investigate ways to achieve view interpolation by mean of forward and backward mapping. We present situations in which each one requires less computations and gives better results. Contrary to what we might expect, very simple stereo algorithms can produce very convincing interpolation despite providing really bad disparity maps. We propose to explain this with a probabilistic model of depth discontinuities. We test this model on synthetic data created to fit real image statistics and compare with images widely used in stereo. In practice, forward and backward mapping methods can rely on simple stereo algorithms running in real time, to produce very good results. A sequence of real images was acquired to allow accurate comparison of interpolated images, and standard metrics are used to assess the quality.
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Calibration of Cameras with Radially Symmetric Distortion
Abstract We present algorithms for plane-based calibration of general radially distorted cameras. By this we understand cameras that have a distortion center and an optical axis such that the projection rays of pixels lying on a circle centered on the … Continue reading
Posted in Jean-Philippe Tardif, Martin Trudeau, PAMI, Peter Sturm, Sébastien Roy
Tagged calibration, catadioptric, fisheye, omnidirectionnel
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Reconstruction of the surface of the Sun from stereoscopic images
Abstract This thesis concentrates on the stereoscopic reconstruction of environments containing transparent objects. The data used to test the algorithms is graciously provided by NASA through the STEREO mission. This thesis proposes a new spherical rectification technique as well as … Continue reading
Reconstruction par Stéréo Photométrique
Posted in Jamil Draréni, prédoc
Tagged méthodes photométriques, modélisation 3D, stéréo
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(English) Plane-based Self-calibration of Radial Distortion
Abstract We present an algorithm for plane-based self-calibration of cameras with radially symmetric distortions given a set of sparse feature matches in at least two views. The projection function of such cameras can be seen as a projection with a … Continue reading
Posted in ICCV, Jean-Philippe Tardif, Peter Sturm, Sébastien Roy
Tagged calibration, fisheye
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Two-frame frequency-based estimation of local motion parallax direction in 3D cluttered scenes
V. Couture, M.S. Langer, A. Caine, R. Mann. Two-frame frequency-based estimation of local motion parallax direction in 3D cluttered scenes, 6th International Conference on 3-D Digital Imaging and Modeling, Montreal (Canada), August 2007, pp 357-364. Abstract When an observer moves … Continue reading
Posted in 3DIM, Publications, Vincent Couture
Tagged flux optique, mouvement, neige optique, scènes complexes
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(English) A Simple Oriented Mean-Shift Algorithm For Tracking
Posted in ICIAR, Jamil Draréni, Sébastien Roy
Tagged histogrammes, mean-shift, tracking
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Can Lucas-Kanade be used to estimate motion parallax in cluttered 3D scenes?
V. Couture and M.S. Langer. Can Lucas-Kanade be used to estimate motion parallax in cluttered 3D scenes?, 4th Canadian Conference on Computer and Robot Vision, Montreal (Canada), May 2007. Abstract When an observer moves in a 3D static scene, the … Continue reading
Posted in CRV, Publications, Vincent Couture
Tagged flux optique, mouvement, neige optique, scènes complexes
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