Direct linear transformation
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Direct linear transformation (DLT) is an algorithm which solves a set of variables from a set of similarity relations:
- for
where and are known vectors, denotes equality up to an unknown scalar multiplication, and is a matrix (or linear transformation) which contains the unknowns to be solved.
This type of relation appears frequently in projective geometry. Practical examples include the relation between 3D points in a scene and their projection onto the image plane of a pinhole camera,[1] and homographies.