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Small Baseline Stereovision

Small Baseline Stereovision,10.1007/s10851-007-0001-1,Journal of Mathematical Imaging and Vision,Julie Delon,Bernard Rougé

Small Baseline Stereovision   (Citations: 4)
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This paper presents a study of small baseline stereovision. It is generally admitted that because of the finite resolution of images, getting a good precision in depth from stereovision demands a large angle between the views. In this paper, we show that under simple and feasible hypotheses, small baseline stereovision can be rehabilitated and even favoured. The main hypothesis is that the images should be band limited, in order to achieve sub-pixel precisions in the matching process. This assumption is not satisfied for common stereo pairs. Yet, this becomes realistic for recent spatial or aerian acquisition devices. In this context, block-matching methods, which had become somewhat obsolete for large baseline stereovision, regain their relevance. A multi-scale algorithm dedicated to small baseline stereovision is described along with experiments on small angle stereo pairs at the end of the paper.
Journal: Journal of Mathematical Imaging and Vision - JMIV , vol. 28, no. 3, pp. 209-223, 2007
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    • ...This distance is known as the parallax or disparity d. Based on the similar triangles of this geometry, the following simple expressions can be derived [8], [9]...
    • ...It has been proposed in [8] and [9] that, by allowing B/H → 0 (i.e., a very narrow baseline), then occlusions will be minimized, essentially because each image view becomes more geometrically similar...
    • ...Yet, due to the favored wide-baseline convention and the finite resolution of digital images, the majority of existing stereo image-matching algorithms are designed to measure disparities with only integer-pixel precision [8], [9], [11]...

    Gareth Llewellyn Keith Morganet al. Precise Subpixel Disparity Measurement From Very Narrow Baseline Stere...

    • ...Fortunately, thanks to recent advances in subpixel stereo [1, 2, 3], lower baselines have become tractable, thus enabling quasi-simultaneous single-instrument stereo...
    • ...Their reliable detection is crucial for the high resolution low baseline systems proposed at CNES by [4, 2]...
    • ...This is problematic, because edges are prone to fattening errors [2]...

    Neus Sabateret al. Discarding moving objects in quasi-simultaneous stereovision

    • ...In this paper we concentrate on the specific case of disparity maps obtained by photogrammetry from low-baseline stereo pairs [3] even though our method could be applied to other data (large-baseline stereovision, 3D points from multiview stereo)...

    Eric Bughinet al. Fast plane detection in disparity maps

    • ...The Delon et al. [4] paper proposes a different strategy, the barycentric correction attributing the disparity of a window to the window barycenter pondered by the image gradients...
    • ...The use of a low B/H (where B is the baseline and H is the altitude) was proposed in satellite imaging by Delon and Rouge [4]...
    • ...Following the formulation by Delon and Rouge [4] and Sabater [17], around such points, the deformation model from an image to the other is...

    G. Blanchetet al. Fattening Free Block Matching

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