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- W1970609567 abstract "The projective transformation of 3D object points to 2D image points can be expressed in homogeneous coordinates by the 3 by 4 direct linear transformation (DLT) matrix. If the object points are coplanar, the transformation can be expressed by the 3 by 3 DLT matrix. This article presents non-iterative, fast and exact methods for extracting the physical camera parameters from the 3 by 3 matrix. Three parameters must be known or estimated in order to extract the remaining eight. The decomposition problem is solved under three different assumptions about known parameters. All three methods are based on solving two quadratic equations in two unknowns. The equations originate from the orthogonality constraints on the first two columns of the rotation matrix. The methods are well suited for finding initial values in point based camera calibration. They solve the coplanar perspective-n-point problem for any n >= 4.© (1994) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only." @default.
- W1970609567 created "2016-06-24" @default.
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- W1970609567 date "1994-03-01" @default.
- W1970609567 modified "2023-09-25" @default.
- W1970609567 title "<title>Extracting physical camera parameters from the 3 x 3 direct linear transformation matrix</title>" @default.
- W1970609567 doi "https://doi.org/10.1117/12.169859" @default.
- W1970609567 hasPublicationYear "1994" @default.
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