Browsing by Author "Seo, Hyewon"

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    Groupwise Shape Correspondence Refinement with a Region of Interest Focus
    (The Eurographics Association and John Wiley & Sons Ltd., 2023) Galmiche, Pierre; Seo, Hyewon; Chaine, Raphaëlle; Deng, Zhigang; Kim, Min H.
    While collections of scan shapes are becoming more prevalent in many real-world applications, finding accurate and dense correspondences across multiple shapes remains a challenging task. In this work, we introduce a new approach for refining non-rigid correspondences among a collection of 3D shapes undergoing non-rigid deformation. Our approach incorporates a Region Of Interest (ROI) into the refinement process, which is specified by the user on one shape within the collection. Based on the functional map framework and more specifically on the notion of cycle-consistency, our formulation improves the overall matching consistency while prioritizing that of the region of interest. Specifically, the initial pairwise correspondences are refined by first defining the localized harmonics that are confined within the transferred ROI on each shape, and subsequently applying the CCLB (Canonical Consistent Latent Basis) framework both on the global and the localized harmonics. This leads to an enhanced matching accuracy for both the ROIs and the overall shapes across the collection. We evaluate our method on various synthetic and real scan datasets, in comparison with the state-of-the-art techniques.
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    Reconstructing Flowers from Sketches
    (The Eurographics Association and John Wiley & Sons Ltd., 2018) Bobenrieth, Cédric; Seo, Hyewon; Cordier, Frédéric; Habibi, Arash; Fu, Hongbo and Ghosh, Abhijeet and Kopf, Johannes
    As the symbol of beauty, floral objects have been one of the most popular subjects of artistic drawing. However, designing 3D floral models is generally time- and resource-consuming, because of their structural and geometrical complexity. In this paper, we address the problem of reconstructing floral objects from sketch input. The user draws a relatively clean sketch of a flower and a few additional guide markings from an arbitrary view to rapidly create quality geometric models of flowers. Our system offers a novel modeling scheme compared to several existing flower modelers accepting sketch as input, where the user is required to work with different views, providing step-by-step sketch input. Given the silhouette and the guide strokes, an assumed, common botanical structure is estimated, i.e. a cone for each ring of petals. The cones and the silhouette sketch that we segment into elementary curves are used to retrieve model elements from the pre-constructed shape database. These elements are then placed together around the cone, where an additional, per-element deformation is performed so as to maximize the silhouette similarity between the user sketch and the 3D flower model from the chosen view. Our system has shown to robustly create a variety of flowers in various configurations, including flower models with several petal layers and various blooming degrees, drawn from different views.