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Yihong Gong - One of the best experts on this subject based on the ideXlab platform.

  • Locality-constrained linear coding for image classification
    Proceedings of the IEEE Computer Society Conference on Computer Vision and Pattern Recognition, 2010
    Co-Authors: Jinjun Wang, Fengjun Lv, Jianchao Yang, Thomas Huang, Kai Yu, Yihong Gong
    Abstract:

    The traditional SPM approach based on bag-of-features (BoF) requires nonlinear classifiers to achieve good image classification performance. This paper presents a simple but effective coding scheme called Locality-constrained Linear Coding (LLC) in place of the VQ coding in traditional SPM. LLC utilizes the Locality constraints to project each descriptor into its Local-Coordinate System, and the projected Coordinates are integrated by max pooling to generate the final representation. With linear classifier, the proposed approach performs remarkably better than the traditional nonlinear SPM, achieving state-of-the-art performance on several benchmarks. Compared with the sparse coding strategy [22], the objective function used by LLC has an analytical solution. In addition, the paper proposes a fast approximated LLC method by first performing a K-nearest-neighbor search and then solving a constrained least square fitting problem, bearing computational complexity of O(M + K2). Hence even with very large codebooks, our System can still process multiple frames per second. This efficiency significantly adds to the practical values of LLC for real applications.

  • nonlinear learning using Local Coordinate coding
    Neural Information Processing Systems, 2009
    Co-Authors: Tong Zhang, Yihong Gong
    Abstract:

    This paper introduces a new method for semi-supervised learning on high dimensional nonlinear manifolds, which includes a phase of unsupervised basis learning and a phase of supervised function learning. The learned bases provide a set of anchor points to form a Local Coordinate System, such that each data point x on the manifold can be Locally approximated by a linear combination of its nearby anchor points, and the linear weights become its Local Coordinate coding. We show that a high dimensional nonlinear function can be approximated by a global linear function with respect to this coding scheme, and the approximation quality is ensured by the Locality of such coding. The method turns a difficult nonlinear learning problem into a simple global linear learning problem, which overcomes some drawbacks of traditional Local learning methods.

Mathe P.-e. - One of the best experts on this subject based on the ideXlab platform.

  • Integrated geophysical surveys at the archaeological site: the buried complex IV, XVII, 4 in Ostia (Rome, Italy). Part 6. Electro-magnetic survey mapping (apparent conductivity)
    HAL CCSD, 2020
    Co-Authors: Uehara Minoru, Turci Marcello, Mathe P.-e.
    Abstract:

    The origin of the Local Coordinate System for mapping in UTM zone 33N is (274427.5, 4625631.0) whose altitude is 2.854 m from mean sea level (M.S.L.). The direction of the Y-axis is rotated 11.341 degrees eastward from the north.These maps are the results of the research, focused on the complex east of the Baths of the Porta Marina, is part of a research project on the coastal area of Ostia carried out by the Centre Camille Jullian, CEREGE and MAP-CNRS in collaboration with the Archaeological Park of Ostia Antica.The integrated study of geophysical prospections (electrical resistivity tomography, magnetic field mapping, electro-magnetic survey), satellite images and topography allowed to define the characteristics of a large complex covering an area of approx. 15,000 m2.In particular, the presence of a large open area, flanked by a building with a basilical plan, makes it possible to recognize the structures of a forum. The location at short distance from the ancient coastline allows to identify the "Aurelian’s forum" and the praetorium known from the Historia Augusta

  • Integrated geophysical surveys at the archaeological site: the buried complex IV, XVII, 4 in Ostia (Rome, Italy). Part 4. Magnetic field map
    HAL CCSD, 2020
    Co-Authors: Uehara Minoru, Turci Marcello, Mathe P.-e.
    Abstract:

    The origin of the Local Coordinate System for mapping in UTM zone 33N is (274427.5, 4625631.0) whose altitude is 2.854 m from mean sea level (M.S.L.). The direction of the Y-axis is rotated 11.341 degrees eastward from the north.These maps are the results of the research, focused on the complex east of the Baths of the Porta Marina, is part of a research project on the coastal area of Ostia carried out by the Centre Camille Jullian, CEREGE and MAP-CNRS in collaboration with the Archaeological Park of Ostia Antica.The integrated study of geophysical prospections (electrical resistivity tomography, magnetic field mapping, electro-magnetic survey), satellite images and topography allowed to define the characteristics of a large complex covering an area of approx. 15,000 m2.In particular, the presence of a large open area, flanked by a building with a basilical plan, makes it possible to recognize the structures of a forum. The location at short distance from the ancient coastline allows to identify the "Aurelian’s forum" and the praetorium known from the Historia Augusta

  • Integrated geophysical surveys at the archaeological site: the buried complex IV, XVII, 4 in Ostia (Rome, Italy). Part 2. Map of the survey area
    HAL CCSD, 2020
    Co-Authors: Uehara Minoru, Turci Marcello, Mathe P.-e.
    Abstract:

    The origin of the Local Coordinate System for mapping in UTM zone 33N is (274427.5, 4625631.0) whose altitude is 2.854 m from mean sea level (M.S.L.). The direction of the Y-axis is rotated 11.341 degrees eastward from the north.These maps are the results of the research, focused on the complex east of the Baths of the Porta Marina, is part of a research project on the coastal area of Ostia carried out by the Centre Camille Jullian, CEREGE and MAP-CNRS in collaboration with the Archaeological Park of Ostia Antica.The integrated study of geophysical prospections (electrical resistivity tomography, magnetic field mapping, electro-magnetic survey), satellite images and topography allowed to define the characteristics of a large complex covering an area of approx. 15,000 m2.In particular, the presence of a large open area, flanked by a building with a basilical plan, makes it possible to recognize the structures of a forum. The location at short distance from the ancient coastline allows to identify the "Aurelian’s forum" and the praetorium known from the Historia Augusta

  • Integrated geophysical surveys at the archaeological site: the buried complex IV, XVII, 4 in Ostia (Rome, Italy). Part 1. Vegetation anomaly with annotations
    HAL CCSD, 2020
    Co-Authors: Uehara Minoru, Turci Marcello, Mathe P.-e.
    Abstract:

    The origin of the Local Coordinate System for mapping in UTM zone 33N is (274427.5, 4625631.0) whose altitude is 2.854 m from mean sea level (M.S.L.). The direction of the Y-axis is rotated 11.341 degrees eastward from the north.These maps are the results of the research, focused on the complex east of the Baths of the Porta Marina, is part of a research project on the coastal area of Ostia carried out by the Centre Camille Jullian, CEREGE and MAP-CNRS in collaboration with the Archaeological Park of Ostia Antica.The integrated study of geophysical prospections (electrical resistivity tomography, magnetic field mapping, electro-magnetic survey), satellite images and topography allowed to define the characteristics of a large complex covering an area of approx. 15,000 m2.In particular, the presence of a large open area, flanked by a building with a basilical plan, makes it possible to recognize the structures of a forum. The location at short distance from the ancient coastline allows to identify the "Aurelian’s forum" and the praetorium known from the Historia Augusta

  • Integrated geophysical surveys at the archaeological site: the buried complex IV, XVII, 4 in Ostia (Rome, Italy). Part 3. Topography map
    HAL CCSD, 2020
    Co-Authors: Uehara Minoru, Turci Marcello, Mathe P.-e.
    Abstract:

    The origin of the Local Coordinate System for mapping in UTM zone 33N is (274427.5, 4625631.0) whose altitude is 2.854 m from mean sea level (M.S.L.). The direction of the Y-axis is rotated 11.341 degrees eastward from the north.These maps are the results of the research, focused on the complex east of the Baths of the Porta Marina, is part of a research project on the coastal area of Ostia carried out by the Centre Camille Jullian, CEREGE and MAP-CNRS in collaboration with the Archaeological Park of Ostia Antica.The integrated study of geophysical prospections (electrical resistivity tomography, magnetic field mapping, electro-magnetic survey), satellite images and topography allowed to define the characteristics of a large complex covering an area of approx. 15,000 m2.In particular, the presence of a large open area, flanked by a building with a basilical plan, makes it possible to recognize the structures of a forum. The location at short distance from the ancient coastline allows to identify the "Aurelian’s forum" and the praetorium known from the Historia Augusta

G R Liu - One of the best experts on this subject based on the ideXlab platform.

  • an edge based smoothed finite element method es fem using 3 node triangular elements for 3d non linear analysis of spatial membrane structures
    International Journal for Numerical Methods in Engineering, 2011
    Co-Authors: Zhiqian Zhang, G R Liu
    Abstract:

    An edge-based smoothed finite element method using 3-node triangular membrane elements (ES-FEM-T3) is proposed to analyze three-dimensional (3D) spatial membrane structures under large deflection, rotation, and strain. In our 3D formulation, co-rotational Local Coordinate Systems associated with the edge-based smoothing domains are constructed. Edge-based gradient smoothing for the spatial membrane structure is performed in global Cartesian Coordinate System and transformed into the co-rotational Local Coordinate System. The smoothed strain and stress can then be properly evaluated in the co-rotational Local Coordinate System after the elimination of the rigid body motions simply by Coordinates transformation. Explicit time integration scheme is used to compute the transient response of the 3D spatial membrane structure to time-domain excitations, and the dynamic relaxation method is employed to obtain steady-state solutions. The numerical results demonstrate that the proposed method produces much better solution accuracy and computational efficiency than the standard FEM using T3 membrane element. Copyright © 2010 John Wiley & Sons, Ltd.

S W Lee - One of the best experts on this subject based on the ideXlab platform.

Jinjun Wang - One of the best experts on this subject based on the ideXlab platform.

  • Locality-constrained linear coding for image classification
    Proceedings of the IEEE Computer Society Conference on Computer Vision and Pattern Recognition, 2010
    Co-Authors: Jinjun Wang, Fengjun Lv, Jianchao Yang, Thomas Huang, Kai Yu, Yihong Gong
    Abstract:

    The traditional SPM approach based on bag-of-features (BoF) requires nonlinear classifiers to achieve good image classification performance. This paper presents a simple but effective coding scheme called Locality-constrained Linear Coding (LLC) in place of the VQ coding in traditional SPM. LLC utilizes the Locality constraints to project each descriptor into its Local-Coordinate System, and the projected Coordinates are integrated by max pooling to generate the final representation. With linear classifier, the proposed approach performs remarkably better than the traditional nonlinear SPM, achieving state-of-the-art performance on several benchmarks. Compared with the sparse coding strategy [22], the objective function used by LLC has an analytical solution. In addition, the paper proposes a fast approximated LLC method by first performing a K-nearest-neighbor search and then solving a constrained least square fitting problem, bearing computational complexity of O(M + K2). Hence even with very large codebooks, our System can still process multiple frames per second. This efficiency significantly adds to the practical values of LLC for real applications.