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Unstructured Light Scanning to Overcome Interreflections

V. Couture, N. Martin, S. Roy. Unstructured Light Scanning to Overcome Interreflections, International Conference on Computer Vision (ICCV), 2011.

Posted in ICCV, Nicolas Martin, Sébastien Roy, Uncategorized, Vincent Couture | Tagged , | Leave a comment

Panoramic Stereo Video Textures

omnistereo

V. Couture, M.S. Langer, S. Roy. Panoramic Stereo Video Textures, International Conference on Computer Vision (ICCV), 2011.

Posted in ICCV, Michael Langer, Sébastien Roy, Vincent Couture | Tagged | Leave a comment

Capturing Non-Periodic Omnistereo Motion

omnicalib

Abstract An omnistereo pair of images enables depth perception all around the observer. Because omnistereo lenses or mirrors do not yet exist, capturing an omnistereo video would require using several stereo cameras at different baseline orientations. This paper presents a … Continue reading

Posted in Michael Langer, Omnistéréo, OMNIVIS, Sébastien Roy, Vincent Couture | Tagged , , | Leave a comment

Geometric Video Projector Auto-Calibration

shapeimage_1

Abstract I this paper we address the problem of geometric calibration of video projectors. Like in most previous methods we also use a camera that observes the projection on a planar surface. Contrary to those previous methods, we neither require … Continue reading

Posted in Jamil Draréni, Peter Sturm, PROCAM, Sébastien Roy | Tagged , , , | 3 Comments

Virtual 3D drawing tool for stage performances

vric_icon

This paper presents a new system for tridimensional virtual drawing relying on an infrared pen observed by a number of surrounding cameras. Nintendo wiimotes are used as cameras to provide reliable real-time tracking information. Continue reading

Posted in Lucie Bélanger, Sébastien Roy, VRIC, Wiimmersion | Tagged , , , | 1 Comment

Calibration de projecteur par plan non-marqué

Sorry, this entry is only available in Français.

Posted in Jamil Draréni, ORASIS, Peter Sturm, Sébastien Roy | Tagged , , | Leave a comment

Projector Calibration Using a Markerless plane

wall-camera homography

Abstract In this paper we address the problem of geometric video projector calibration using a markerless planar surface (wall) and a partially calibrated camera. Instead of using control points to infer the camera-wall orientation, we find such relation by efficiently … Continue reading

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Plane-Based Calibration for Linear Cameras

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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 | Leave a comment

Fast View Interpolation from Stereo: Simpler can be Better

213-TI

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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Posted in 3DPVT, Nicolas Martin, Sébastien Roy | Tagged , | Leave a comment

(English) Plane-based Self-calibration of Radial Distortion

iccv2007icon

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 , | Leave a comment