Matching of 3D surfaces and their intensitiesDevrim Akca
- ISPRS Journal of Photogrammetry and Remote Sensing, June 2007, Elsevier
- DOI: 10.1016/j.isprsjprs.2006.06.001
COMBINED CO-REGISTRATION OF GEOMETRY & INTENSITY. Matching of 3D surfaces and their intensities
What is it about?
In a previous paper, an algorithm for the least squares matching of overlapping 3D surfaces, which were digitized/sampled point by point using a laser scanner device, by the photogrammetric method or other techniques, was proposed [Gruen, A., and Akca, D., 2005. Least squares 3D surface and curve matching. ISPRS Journal of Photogrammetry and Remote Sensing 59 (3), 151–174.]. That method estimates the transformation parameters between two or more fully 3D surfaces, minimizing the Euclidean distances instead of z-differences between the surfaces by least squares. In this paper, an extension to the basic algorithm is given, which can simultaneously match surface geometry and its attribute information, e.g. intensity, colour, temperature, etc. under a combined estimation model.
Why is it important?
3D surface matching would be an ill conditioned problem when the curvature of the object surface is either homogenous or isotropic, e.g. for plane or spherical types of objects. A reliable solution can only be achieved if supplementary information or functional constraints are introduced.