Measuring apparatus and corresponding measuring method
AssigneeTesto SE & Co. KGaA
InventorsJan-Friso Evers-Senne, Robert Wulff, Dominik Wolters
Life of this patent
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Abstract
A measuring apparatus (1) for measuring at least one geometric variable (h), and to a corresponding measuring method are provided. The measuring apparatus (1) is preferably designed as a handheld apparatus for creating a dimensional measurement of an examination object (3). The measuring method according to the invention is distinguished by the fact that from a sequence of images, preferably recorded by a camera (5), both robust features (9) and precise features (13) to be distinguished therefrom in a regular manner are detected, such that a robust 3D model is created and precise information about the geometric variable (h) to be measured is calculated.
Claims24
A measuring apparatus (1) for measuring at least one geometric variable of an examination object (3), comprising a camera (5) for recording a sequence of images of the examination object (3), a processor (7) configured for computer-aided detection of robust features (9) by feature recognition from the images of the sequence, wherein the robust features (9) include contents that are suitable for identification of corresponding image regions (11) among the images of the sequence, and configured for computer-aided identification of the corresponding image regions (11) among the images by the detected robust features (9) and computer-aided generation of a 3D model from a result of the identification, the processor is further configured for computer-aided detection of precise features (13) by at least one of corner or edge detection from the images of the sequence, and a selection device (15) configured for selecting a set of precise features (13), the processor (7) is further configured for computer-aided calculation of a geometric variable (h) from the set of precise features (13) in the 3D model.
A measuring method for measuring at least one geometric variable (h) on an examination object (3), comprising the following steps:
- recording a sequence of images of the examination object (3),
- computer-aided detection of robust features (9) by of feature recognition from the images of the sequence using a processor, in which the robust features (9) include contents suitable for identification of corresponding image regions (11) among the images of the sequence,
- computer-aided identification of corresponding image regions (11) among the images by the robust features (9) that are extracted and computer-aided generation of a 3D model from the result of the identification,
- computer-aided detection of precise features (13) by at least one of corner or edge detection from the images of the sequence,
- selecting a set of precise features (13), and
- computer-aided calculation of the geometric variable (h) from the set of precise features (13) in the 3D model.
Dependencies are inferred from the claim text.