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Upright orientation of man-made objects

Upright orientation of man-made objects,10.1145/1360612.1360641,ACM Transactions on Graphics,Hongbo Fu,Daniel Cohen-or,Gideon Dror,Alla Sheffer

Upright orientation of man-made objects   (Citations: 18)
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Humans usually associate an upright orientation with objects, plac- ing them in a way that they are most commonly seen in our sur- roundings. While it is an open challenge to recover the function- ality of a shape from its geometry alone, this paper shows that it is often possible to infer its upright orientation by analyzing its geometry. Our key idea is to reduce the two-dimensional (spher- ical) orientation space to a small set of orientation candidates using functionality-related geometric properties of the object, and then determine the best orientation using an assessment function of sev- eral functional geometric attributes defined with respect to each candidate. Specifically we focus on obtaining the upright orienta- tion for man-made objects that typically stand on some flat surface (ground, floor, table, etc.), which include the vast majority of ob- jects in our everyday surroundings. For these types of models ori- entation candidates can be defined according to static equilibrium. For each candidate, we introduce a set of discriminative attributes linking shape to function. We learn an assessment function of these attributes from a training set using a combination of Random For- est classifier and Support Vector Machine classifier. Experiments demonstrate that our method generalizes well and achieves about 90% prediction accuracy for both a 10-fold cross-validation over the training set and a validation with an independent test set.
Journal: ACM Transactions on Graphics - TOG , vol. 27, no. 3, 2008
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    • ...Optimization-based approach Fu et al. [5] proposed an upright alignment algorithm for man-made models...
    • ...First, we determine the top and bottom orientations of the model by adopting the static stability metric in upright orientation [5]...

    Henry Johanet al. 3D model alignment based on minimum projection area

    • ...Fu et al. [14] proposed to infer the upright orientation of a model by defining and learning several functional geometric attributes with respect to each candidate on the convex hull of the original object...
    • ...Though Fu et al. [14] and Lian et al. [16] aimed at finding the natural poses of models through geometry analysis, they do not generate canonical views directly...
    • ...After determining the three coordinate axes, there are six upright orientation candidates, namely +x, -x, +y, -y, +z and -z. Since all the CAD models are man-made, Fu’s method [14] can be applied...
    • ...About 3.5% of the ESB models are failed, because they have low value of P defined in Equation 14, as shown in Fig 8. To test the fitness of our method, we experiment on ESB, the dataset used in [14] (denoted as UPB), and the man-made objects in PSB (denoted as PSB(M))...

    Kai-Mo Huet al. Automatic Generation of Canonical Views for CAD Models

    • ...As noticed in [3], the stable planes of a model are a subset of the tangent planes enclosing a model which are the planar faces of the convex hull...
    • ...In our case, different to [3], we are not just interested in the upright orientation base...
    • ...captures the static stability of π and d1,d2 represent the coincidence distance and collinearity distance approximating symmetry characteristics of π as described in [3]...

    Aitor Aldomaet al. Pose Alignment for 3D Models and Single View Stereo Point Clouds Based...

    • ...Fu et al. (2008) demonstrated how to learn upright orientation for man-made objects from their functionality-related geometric properties including static stability, symmetry, parallelism, and visibility...
    • ...Fu et al. (2008) suggested that their orientation method could help to view an object in a natural way, since humans usually associate an upright orientation with objects...

    Zhouhui Lianet al. Rectilinearity of 3D Meshes

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