Abstract: In various embodiments, techniques are provided for photogrammetric 3D model reconstruction that modify the optimization performed in bundle adjustment operations of an automatic SfM stage to apply a depth-aware weighting to reprojection error of each 3D point used in the optimization. The reprojection error of each 3D point may be weighted based on a function of distance, density of a cluster, or a combination of distance and density. A loss function may be scaled to account for the weighting, and normalizations applied. Such weighting may force consideration of 3D points on an object of interest in the foreground and improve convergence of the optimization to global optima. In such manner, accurate and complete 3D models may be reconstructed of even ill-textured or very thin objects in the foreground of a scene with a highly textured background, while not consuming excessive processing and storage resources or requiring tedious workflows.

Abstract: A system (1) for aiding navigation includes an airport navigation device (2) to generate a ground route within the airport for an aided aircraft, a device (3) for determining the current position of the aided aircraft, a traffic surveillance device (9) for determining the location and type of nearby aircraft, a computation unit (10) for determining, for each segment of the ground route congestion information as a function of the position, type and speed of the nearby aircraft on each of the segments, and a display device displaying an airport map, the current location of the aided aircraft and congestion information for each segment.

Abstract: In various embodiments, techniques are provided for photogrammetric 3D model reconstruction that modify the optimization performed in bundle adjustment operations of an automatic SfM stage to apply a depth-aware weighting to reprojection error of each 3D point used in the optimization. The reprojection error of each 3D point may be weighted based on a function of distance, density of a cluster, or a combination of distance and density. A loss function may be scaled to account for the weighting, and normalizations applied. Such weighting may force consideration of 3D points on an object of interest in the foreground and improve convergence of the optimization to global optima. In such manner, accurate and complete 3D models may be reconstructed of even ill-textured or very thin objects in the foreground of a scene with a highly textured background, while not consuming excessive processing and storage resources or requiring tedious workflows.

Abstract: A distance measuring device, in particular a hand-held laser distance meter, includes a housing, transmission unit, receiving unit, and first operating unit. The first operating unit is arranged on the housing and configured to trigger at least one distance measurement, and includes a disk element. The transmission unit is arranged in the housing and is configured to transmit a measuring radiation in a direction of an object to be measured. The receiving unit is configured to receive measuring radiation returning from the object. A method for operating the distance measuring device includes starting at least one first distance measurement by moving the first operating element from a first a second position at which the device is deactivated to a first position, in particular along a measurement axis, to trigger the measurement, or in particular a sequence of continuous distance measurements.

Abstract: A system (1) for aiding navigation includes an airport navigation device (2) to generate a ground route within the airport for an aided aircraft, a device (3) for determining the current position of the aided aircraft, a traffic surveillance device (9) for determining the location and type of nearby aircraft, a computation unit (10) for determining, for each segment of the ground route congestion information as a function of the position, type and speed of the nearby aircraft on each of the segments, and a display device displaying an airport map, the current location of the aided aircraft and congestion information for each segment.

Abstract: A method, system, and apparatus provide the ability to globally register point cloud scans. A first and a second three-dimensional (3D) point cloud are acquired. The point clouds have a subset of points in common and there is no prior knowledge on an alignment between the point clouds. Particular points that are likely to be identified in the other point cloud are detected. Information about a normal of each of the detected particular points is retrieved. A descriptor (that only describes 3D information) is built on each of the detected particular points. Matching pairs of descriptors are determined. Rigid transformation hypotheses are estimated (based on the matching pairs) and represent a transformation. The hypotheses are accumulated into a fitted space, selected based on density, and validated based on a scoring. One of the hypotheses is then selected as a registration.

Abstract: A method, system, and computer program product provide the ability to dynamically generate a three-dimensional (3D) scene. A red green blue (RGB) image (in RGB color space) of the 3D scene is acquired. The RGB image is converted from RGB color space to a luminance (Y) and chrominance (UV) image in YUV color space (hat includes Y information and UV information). Reflectance information of the 3D scene is acquired from a laser scanner. Based on a blending function, the luminance information is blended with the reflectance information resulting in a blended YUV image. The blended YUV image is converted from YUV color space into RGB color space resulting in a blended RGB image that is output.

Abstract: A rangefinder includes a display, an operator control element, a distance measuring apparatus, and a computation apparatus configured (i) to initiate a measurement by the distance measuring apparatus when the operator control element is operated, and (ii) to switch on at least the display when the operator control element is operated with the display switched off.

Abstract: A method, system, and computer program product provide the ability to dynamically generate a three-dimensional (3D) scene. A red green blue (RGB) image (in RGB color space) of the 3D scene is acquired. The RGB image is converted from RGB color space to a luminance (Y) and chrominance (UV) image in YUV color space (hat includes Y information and UV information). Reflectance information of the 3D scene is acquired from a laser scanner. Based on a blending function, the luminance information is blended with the reflectance information resulting in a blended YUV image. The blended YUV image is converted from YUV color space into RGB color space resulting in a blended RGB image that is output.

Abstract: A method, system, and apparatus provide the ability to globally register point cloud scans. A first and a second three-dimensional (3D) point cloud are acquired. The point clouds have a subset of points in common and there is no prior knowledge on an alignment between the point clouds. Particular points that are likely to be identified in the other point cloud are detected. Information about a normal of each of the detected particular points is retrieved. A descriptor (that only describes 3D information) is built on each of the detected particular points. Matching pairs of descriptors are determined. Rigid transformation hypotheses are estimated (based on the matching pairs) and represent a transformation. The hypotheses are accumulated into a fitted space, selected based on density, and validated based on a scoring. One of the hypotheses is then selected as a registration.

Abstract: A rotation laser, in particular for surveying tasks, includes a remote control unit. The rotation laser has at least one operating mode necessary for measurement operation that is configured to be controlled exclusively by the remote control unit.

Abstract: The disclosure proceeds from a system with a measurement bar and a measurement device, having at least one computation unit, an inclination measurement means and an electronic distance measurement means. The disclosure proposes that the system have a coupling apparatus which is provided for coupling the measurement bar and the measurement device such that they can be separated by an operator.

Abstract: A distance measuring device, in particular a hand-held laser distance meter, includes a housing, transmission unit, receiving unit, and first operating unit. The first operating unit is arranged on the housing and configured to trigger at least one distance measurement, and includes a disk element. The transmission unit is arranged in the housing and is configured to transmit a measuring radiation in a direction of an object to be measured. The receiving unit is configured to receive measuring radiation returning from the object. A method for operating the distance measuring device includes starting at least one first distance measurement by moving the first operating element from a first a second position at which the device is deactivated to a first position, in particular along a measurement axis, to trigger the measurement, or in particular a sequence of continuous distance measurements.

Abstract: A rangefinder includes a display, an operator control element, a distance measuring apparatus, and a computation apparatus configured (i) to initiate a measurement by the distance measuring apparatus when the operator control element is operated, and (ii) to switch on at least the display when the operator control element is operated with the display switched off.

Abstract: A rotation laser, in particular for surveying tasks, includes a remote control unit. The rotation laser has at least one operating mode necessary for measurement operation that is configured to be controlled exclusively by the remote control unit.

Abstract: The disclosure proceeds from a system with a measurement bar and a measurement device, having at least one computation unit, an inclination measurement means and an electronic distance measurement means. The disclosure proposes that the system have a coupling apparatus which is provided for coupling the measurement bar and the measurement device such that they can be separated by an operator.

Abstract: A method and device for assisting in the navigation of an airplane on the ground at an airport employs a display unit for automatically presenting data relating to the path to be followed by the airplane at the airport in textual form on a display screen, and a display unit for automatically presenting this data in graphic form on a display screen, using a plot illustrating said path on an airport map.

Abstract: The device (1) comprises means (12) for automatically presenting data relating to the path to be followed by the airplane at the airport in textual form on a display screen (14), and means (2) for automatically presenting this data in graphic form on a display screen (3), using a plot illustrating said path on an airport map.