Matrix: Luong/photogrammetry2

Description: Photogrammetry problem, B. Luong, FOGALE nanotech, France

Luong/photogrammetry2 graph
(bipartite graph drawing)


Luong/photogrammetry2

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  • Matrix group: Luong
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  • download as a MATLAB mat-file, file size: 225 KB. Use UFget(1918) or UFget('Luong/photogrammetry2') in MATLAB.
  • download in Matrix Market format, file size: 383 KB.
  • download in Rutherford/Boeing format, file size: 330 KB.

    Matrix properties
    number of rows4,472
    number of columns936
    nonzeros37,056
    structural full rank?yes
    structural rank936
    # of blocks from dmperm1
    # strongly connected comp.1
    explicit zero entries0
    nonzero pattern symmetry 0%
    numeric value symmetry 0%
    typereal
    structurerectangular
    Cholesky candidate?no
    positive definite?no

    authorB. Luong
    editorT. Davis
    date2008
    kindcomputer graphics/vision problem
    2D/3D problem?yes

    Additional fieldssize and type
    bfull 4472-by-1

    Notes:

    Photogrammetry problem from Bruno Luong, FOGALE nanotech, France.
    This problem is nearly rank-deficient.                           
    

    Ordering statistics:result
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD700,841
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD61,250

    SVD-based statistics:
    norm(A)0.000283389
    min(svd(A))2.11626e-12
    cond(A)1.33911e+08
    rank(A)936
    sprank(A)-rank(A)0
    null space dimension0
    full numerical rank?yes

    singular values (MAT file):click here
    SVD method used:s = svd (full (A)) ;
    status:ok

    Luong/photogrammetry2 svd

    For a description of the statistics displayed above, click here.

    Maintained by Tim Davis, last updated 12-Mar-2014.
    Matrix pictures by cspy, a MATLAB function in the CSparse package.
    Matrix graphs by Yifan Hu, AT&T Labs Visualization Group.