Structure and motion estimation from dynamic silhouettes under perspective projection

Joshi, Tanuja; Ahuja, Narendra; Ponce, Jean

doi:10.1109/iccv.1995.466927

Cited by 38 publications

(26 citation statements)

References 21 publications

(14 reference statements)

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“…By combining the ideas in [14] and [16], Cross et al implemented a parallax-based technique [17] in which images are registered using a reference plane to "undo" the effect of rotation. Related works also include [18] and [19].…”

Section: Previous Workmentioning

confidence: 99%

Reconstruction of Sculpture From Its Profiles With Unknown Camera Positions

Wong¹,

Cipolla

2004

IEEE Trans. on Image Process.

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Profiles of a sculpture provide rich information about its geometry, and can be used for shape recovery under known camera motion. By exploiting correspondences induced by epipolar tangents on the profiles, a successful solution to motion estimation from profiles has been developed in the special case of circular motion. The main drawbacks of using circular motion alone, namely the difficulty in adding new views and part of the object always being invisible, can be overcome by incorporating arbitrary general views of the object and registering its new profiles with the set of profiles resulted from the circular motion. In this paper, we describe a complete and practical system for producing a 3D model from uncalibrated images of an arbitrary object using its profiles alone. Experimental results on various objects are presented, demonstrating the quality of the reconstructions using the estimated motion. Index TermsStructure and Motion, Shape from Profiles, 3D Model Acquisition.

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Section: Previous Workmentioning

confidence: 99%

Reconstruction of Sculpture From Its Profiles With Unknown Camera Positions

Wong¹,

Cipolla

2004

IEEE Trans. on Image Process.

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“…An approach for parallel projection has been presented in (Vijaykumar et al, 1995, 52Åström, Cipolla and. Another approach using trinocular stereo has been presented in (Joshi et al, 1995).…”

Section: Introductionmentioning

confidence: 99%

Generalised epipolar constraints

Åström

Cipolla

Giblin

1996

Lecture Notes in Computer Science

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Abstract. In this paper we will discuss structure and motion problems for curved surfaces. These will be studied using the silhouettes or apparent contours in the images. The problem of determining camera motion from the apparent contours of curved three-dimensional surfaces, is studied. It will be shown how special points, called epipolar tangency points or frontier points, can be used to solve this problem. A generalised epipolar constraint is introduced, which applies to points, curves, as well as to apparent contours of surfaces. The theory is developed for both continuous and discrete motion, known and unknown orientation, calibrated and uncalibrated, perspective, weak perspective and orthographic cameras. Results of an iterative scheme to recover the epipolar line structure from real image sequences using only the outlines of curved surfaces, is presented. A statistical evaluation is performed to estimate the stability of the solution. It is also shown how the motion of the camera from a sequence of images can be obtained from the relative motion between image pairs.

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“…Methods for recovering both the surface structure and the camera motion using a trinocular rig have been proposed by Vaillant and Faugeras [35] and Joshi et al [18]. The single-camera case is more difficult, and the algorithms proposed by Giblin et al [15], Mendonca et al [26], and Wong and Cipolla [38] are limited to circular camera motions.…”

Section: Introductionmentioning

confidence: 99%

Robust structure and motion from outlines of smooth curved surfaces

Furukawa

Sethi

Ponce

et al. 2006

IEEE Trans. Pattern Anal. Machine Intell.

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This article addresses the problem of estimating the motion of a camera as it observes the outline (or apparent contour) of a solid bounded by a smooth surface in successive image frames. In this context, the surface points that project onto the outline of an object depend on the viewpoint, and the only true correspondences between two outlines of the same object are the projections of frontier points where the viewing rays intersect in the tangent plane of the surface. In turn, the epipolar geometry is easily estimated once these correspondences have been identified. Given the apparent contours detected in an image sequence, a robust procedure based on RANSAC and a voting strategy is proposed to simultaneously estimate the camera configurations and a consistent set of frontier point projections by enforcing the redundancy of multi-view epipolar geometry. The proposed approach is, in principle, applicable to orthographic, weak-perspective and affine projection models. Experiments with nine real image sequences are presented for the orthographic projection case, including a quantitative comparison with the ground-truth data for the six datasets for which the latter information is available. Sample visual hulls have been computed from all image sequences for qualitative evaluation.

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Structure and motion estimation from dynamic silhouettes under perspective projection

Cited by 38 publications

References 21 publications

Reconstruction of Sculpture From Its Profiles With Unknown Camera Positions

Reconstruction of Sculpture From Its Profiles With Unknown Camera Positions

Generalised epipolar constraints

Robust structure and motion from outlines of smooth curved surfaces

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