Data processing: measuring – calibrating – or testing – Measurement system – Dimensional determination
Patent
1997-04-09
1999-08-31
Assouad, Patrick
Data processing: measuring, calibrating, or testing
Measurement system
Dimensional determination
382294, 702152, 702153, G06T 1700, G06T 100
Patent
active
059466456
ABSTRACT:
A three dimensional imaging method and device including a ranging sensor that is used to produce a series of profiles of a target surface. The profiles comprise one set of profiles nearly parallel to each other and a further such set of nearly parallel profiles, with the profiles of one set extending at an angle to those of the other set to generate a large number of profile crossings. At the location of each crossing the shortest distance between the profiles is detected and represents an energy contribution between this pair of profiles. An energy function is defined as the sum of the energy contributions of all the crossings. Using a known mathematical model, the profiles are then reoriented relative to each other in such a manner as to minimise this total energy. This process can be repeated for higher precision. The finally reoriented profiles can be used to define the desired three-dimensional shape of the target surface.
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Hebert Patrick
Rioux Marc
Assouad Patrick
National Research Council of Canada
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