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مجله بین المللی بینایی کامپیوتر 2013
جزئیات رویداد
همایش ، رویداد ، ژورنال
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  • adaptive non-rigid registration and structure from motion from image trajectories

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    • تاریخ ارائه: 1392/07/24
    • تاریخ انتشار در تی پی بین: 1392/07/24
    • تعداد بازدید: 1084
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
     this paper addresses the problem of registering a known 3d model to a set of 2d deforming image trajectories. the proposed approach can adapt to a scenario where the 3d model to register is not an exact description of the measured image data. this results in finding a 2d–3d registration, given the complexity of having both 2d deforming data and a coarse description of the image observations. the method acts in two distinct phases. first, an affine step computes a factorization for both the 2d image data and the 3d model using a joint subspace decomposition. this initial solution is then upgraded by finding the best projection to the image plane complying with the metric constraints given by a scaled orthographic camera. both steps are computed efficiently in closed-form with the additional feature of being robust to degenerate motions which may possibly affect the 2d image data (i.e. lack of relevant rigid motion). a further extension of the approach allows to compute the full 3d deformations of the shape given the first initial (rigid) registration. this step results in solving a non-rigid structure from motion (nrsfm) problem using the 3d known shape as a prior. experimental results show the robustness of the method in registration tasks such as pose estimation and 3d reconstruction when degenerate image motion is present.

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