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US 7,095,886 B2Granted
Arrangement and method for producing photogrammetric image records
Assigneecorpus.e AG
InventorRobert Massen
Life of this patent
Estimating the term…
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Assigneecorpus.e AG
InventorRobert Massen
Estimating the term…
In the automatic photogrammetric 3D digitization of a body or body part marked e.g. by an envelope provided with photogrammetric target markers, the camera employed for image recording has additional light pattern projectors added thereon which are fastened to the camera body and project geometrically simple structures such as points or lines onto the body. These structures, which are visible optically without the viewing image, facilitate the manual alignment of the camera and the positioning of the camera at the correct distance from the body in obtaining the numerous overlapping individual images required for photogrammetric evaluation. This manually predefined alignment facilitates the automatic association of the photogrammetric markers in the individual image pairs with the aid of image processing methods and allows it to be carried out more reliably on an automated basis. According to a preferred embodiment, the projectors are turned off in the actual image recording process.
An arrangement for obtaining image recordings from which the 3D shape of an object can be determined by photogrammetry, comprising at least one image recording system (70) and a plurality of target markers (50, 60) applied on the surface of the object (10) and arranged to be evaluated photogrammetrically, the arrangement including a means (80, 90, 140) for generating projected light markings which as mounted to the image recording system or systems (70) and alignment markers (1, 2, 3, . . . , 8) on the surface of the object (10) each of which can be associated with an individual one of the image recordings to be obtained for the photogrammetric sensing, the means (80, 90, 140) for generating projected light markings and the alignment markers (1, 2, 3, . . . , 8) respectively associated with the image recordings being positioned in relation to each other such that when the image recording system or systems (70), prior so recording each image, is/are positioned in relation to the object (10) such that light markings generated by the means for generating projected light markings are projected onto the surface of the object (10) in a predetermined position in relation to the alignment markers (1, 2, 3, . . . , 8) provided for the respective image recording, the image recordings are obtained in a manner so as to allow a photogrammetric evaluation of the image recordings using the target markers (50, 60) from which evaluation can be determined 3D shape of the object (10).
A method of obtaining image recordings from which the 3D shape of an object can be determined by photogrammetry, wherein target markers arranged to be evaluated photogrammetrically are applied onto the surface of the object and alignment markers are provided, each of which is associated with an individual one of the image recordings to be obtained for the photogrammetric sensing, at least one image recording system is provided which has mounted thereto a means for generating projected light markings, the image recording system or systems, prior to recording each image, is/are positioned an relation to the object such that light markings generated by the means for generating projected light markings are projected onto the surface of the object in a predetermined position in relation to the alignment markers provided for the respective recording, from which the 3D shape of the object can be determined.
Dependencies are inferred from the claim text.