Stereo camera and stereophotogrammetric method
AssigneeLeica Geosystems AG
InventorElmar Vincent VAN DER ZWAN
Life of this patent
Estimating the term…
Abstract
A handheld device for the image-based measurement of a remote object, comprising a housing having a front side and a rear side, a first and second camera, which are arranged having a stereo base on the rear side, for recording images of the object, an analysis unit having an algorithm for the stereophotogrammetric analysis of the images of the cameras and a display unit, which is arranged on the front side, for displaying images of the object and results of the stereophotogrammetric analysis, wherein the housing has a longitudinal axis, the stereo base is aligned diagonally relative to the longitudinal axis, and the analysis unit is designed for the purpose of taking into consideration the relative alignment of the stereo base during the stereophotogrammetric analysis.
Claims16
1-15. (canceled)
A handheld device for the image-based measurement of a remote object, the handheld device comprising:
- a housing having a front side and a rear side;
- a first camera and a second camera, which are arranged having a stereo base as a fixed spacing in relation to one another on the rear side, for recording images of the object;
- an analysis unit having an algorithm for the stereophotogrammetric analysis of the images of the first camera and the second camera;
- and
- a display unit, which is arranged on the front side, for displaying images of the object and results of the stereophotogrammetric analysis,
- wherein the housing has a longitudinal axis, and the stereo base is aligned diagonally in relation to the longitudinal axis, wherein the analysis unit is designed for the purpose of taking into consideration the relative alignment of the stereo base during the stereophotogrammetric analysis.
A handheld device for the image-based measurement of a remote object, comprising:
- a housing having a front side and a rear side;
- a first camera and a second camera, which are arranged having a stereo base as a fixed spacing in relation to one another on the rear side, for recording images of the object;
- an analysis unit having an algorithm for the stereophotogrammetric analysis of the images of the first camera and the second camera;
- and
- a display unit, which is arranged on the front side, for displaying images of the object and results of the stereophotogrammetric analysis,
- wherein the analysis unit is designed for:
- recognizing repeating patterns in at least one of the images and deriving a repetition direction of repeating features of the object therefrom,
- ascertaining an angle β between the repetition direction and an epipolar line, and
- initiating measurements if the value of the angle β falls below a predefined threshold value, wherein the measurements are capable of resulting in a further recording of images of the object, in which the predefined threshold value is reached or exceeded.
A method for the image-based measurement of a remote object by means of a handheld device, the method comprising:
- a stereoscopic recording of images by a first camera and a second camera, and
- a stereophotogrammetric analysis of the images of the first camera and the second camera,
- wherein the analysis of the images is performed in consideration of a known angle α, wherein the first camera and the second camera are arranged having a stereo base as a fixed spacing in relation to one another on the device such that the stereo base is diagonally oriented at the angle α in relation to a longitudinal axis of the device.
A system for the image-based measurement of a remote object, comprising a handheld device and a computer program product, wherein the handheld device comprises:
- a housing having a front side and a rear side;
- a first camera and a second camera, which are arranged having a stereo base as a fixed spacing in relation to one another on the rear side, for recording images of the object;
- and
- a data interface for transmitting digital image data of recorded images to an external electronic device,
- wherein the computer program product comprises program code which is stored on a machine-readable carrier having an algorithm for the stereophotogrammetric analysis of the images of the first camera and the second camera,
- wherein the housing has a longitudinal axis and the stereo base is aligned diagonally in relation to the longitudinal axis, wherein the program code:
- contains an item of information about the relative alignment of the stereo base,
- is executable in the external electronic device, and
- is designed for the purpose of taking into consideration the relative alignment of the stereo base during the stereophotogrammetric analysis.
Dependencies are inferred from the claim text.