37 results about "Stereo photogrammetry" patented technology

A calibration cage for use in Roentgen Stereophotogrammetric Analysis (RSA), comprising a biplanar configuration of two compartments, each with a fiducial plate at the bottom and a control plate at the top and parallel thereto, the fiducial and control plates of one compartment being oriented at approximately 90° to fiducial and control plates of the other compartment such that a region of interest is positioned on one side of the fiducial and control plates of both compartments.

The present invention provides three-dimensional, topographic data (x,y,z) for a golf course navigation device. In an embodiment of the invention, three data sets are acquired for each golf hole: (1) geospatial digital image data, (2) geospatial terrain data including elevation and topographic measurements, and (3) object data pertaining to trees, bushes, water hazards, buildings, and any other objects present. Each hole is mapped using high resolution airborne photogrammetry and in some cases, light detection and ranging acquisition sensors. Geospatial, three-dimensional terrain data is acquired using a photogrammetry and/or stereo photogrammetry compilation. Object data is acquired from measurements taken from ground level. From all of this acquired data, a three-dimensional (x,y,z) geospatial model is built and then integrated into 3-D gaming, visualization and web mapping environments such as Microsoft Bing Maps, Google Earth, and various mobile and golf cart mounted, golf course navigation systems.

Methods and systems are described herein for high-speed observation and recognition of objects or persons within a controlled area using 3D image data and tomography, stereo-photogrammetry, range finding and/or structured illumination. A wide area security system may comprise multiple pairs of 3D sensors surrounding a controlled area. Using at least two pairs of 3D sensors and a first 3D data collection technique such as tomography, a zone of interest within the controlled area is detected. Using at least one pair of 3D sensors and a second 3D data collection technique such as structured illumination, more 3D image data related to an object of interest is collected. The 3D image data may be compared to data representing known objects and used to identify an object of interest. Methods for fast processing of 3D data and recognition of objects of interest are also described.

The invention is directed to a stereophotogrammetric system and method for generating 3D images. A stereophotogrammetric unit, having a plurality of cameras, is structured to capture a set of images of an object at different angles. A controller is communicably connected to the stereophotogrammetric unit, and is configured to facilitate the simultaneous triggering of the plurality of cameras through a synchronized trigger signal, such that the cameras will capture respective images of the object at the same time. A processing module is configured to generate 3D image from the set of images captured. The controller may further be configured to facilitate the sequential triggering of a plurality of stereophotogrammetric units, such that the object in motion may be captured at increased frames per second. The processing module may further be configured to link together the plurality of 3D images in sequence to then create a 4D image.

The application relates to a surgical robot system. The surgical robot system may include a robot having a robot base, a robot arm coupled to the robot base, and an end-effector coupled to the robot arm. The end-effector, surgical instruments, the patient, and/or other objects to be tracked include active and/or passive tracking markers. Cameras, such as stereophotogrammetric infrared cameras, areable to detect the tracking markers, and the robot determines a 3-dimensional position of the object from the tracking markers.

The invention relates to a surgical robot system that may include a robot having a robot base, a robot arm coupled to the robot base, and an end-effector coupled to the robot arm. The end-effector, surgical instruments, the patient, and/or other objects to be tracked include active and/or passive tracking markers. Cameras, such as stereophotogrammetric infrared cameras, are able to detect the tracking markers, and the robot determines a 3-dimensional position of the object from the tracking markers.

The invention relates to a distributed-analysis-based high-speed video measuring method of a multi-layer-frame anti-seismic experiment. The method comprises: step one, constructing a distributed stereo photogrammetric network and acquiring a structure sequence image; step two, carrying out tracking matching on target points on a to-be-measured structural object by using the distributed stereo photogrammetric network based on a distributed parallel processing strategy, calculating a three-dimensional space coordinate of atarget point sequence image by overall adjustment based on a beam method,and then calculating a vibration parameter of a calculated target point to complete measurement. Compared with the prior art, the distributed-analysis-based high-speed video measuring method has advantages of reducing data processing time, and improving processing efficiency, and the like.

The invention discloses a method for extracting stand structure parameters of artificial forest on the basis of aerial photogrammetric measurement point clouds. The method includes: filtering airbornelidar discrete point cloud data, interpolating to generate a digital terrain model and performing point cloud data normalization processing; extracting and matching true color image pair feature points, performing aerial triangulation to generate the aerial photogrammetric measurement point clouds, and subjecting the aerial photogrammetric measurement point clouds to normalization processing; extracting feature variables on the basis of the normalized aerial photogrammetrical measurement point clouds; respectively constructing a multivariate regression model to predict the structural featuresof each stand in combination with ground measured data and the extracted feature variables. The three-dimensional structural features of forest canopy can be acquired through high overlapping image data efficiently acquired by an unmanned aerial vehicle and by the aid of the three-dimensional point clouds extracted from image pairs with the stereophotogrammetry method, inversion precision of thestand structure parameters is helpfully improved, and problems about high forest coverage and structure parameter inversion 'saturation' of high stand of biomass are effectively solved.

The present invention provides a system for accurate three-dimensional (3D) capture of apparel by 3D scanning and stereo photogrammetry. One or more flexible deflated bladders are inserted into an apparel and inflated by a filling media source. The bladder is inflated to measure at least one of size of the apparel, tensile strength of the fabric of the apparel, or cross section perimeter of the apparel. A rotating structure is anchored onto the stable structure to uniformly rotate all the fixed points of the apparel. One or more 3D scanners are configured to scan the inflated apparel on the stable structure and export the scanned data to one or more software applications. The processor retrieves the 3D scanned dimensional data from a searchable database and compares the given apparel's dimensions with one or more apparels' dimensions in the database to provide the customer with size recommendation via a display.

The device and method are intended for reconstructing in 3-Dimensions comprehensive representations of the head and torso of subject (S) with a portable stereophotogrammetry device which can operate at, at least, two predefined positions (A3, A4). The device is composed of a camera body (1), a double optics (2) and a measuring distance system (34) enabling the repositioning of subject (S) at position (A3) or (A4). The user can operate a switch (5) to select one of these at least two pre-defined positions. The method is further to process the stereo-pairs of the subject to reconstruct 3-Dimensional surfaces (400), match them (500) and then stitch them (600) in a comprehensive representation of the subject. By selecting a distance corresponding to a field of view of respectively approximately A4 dimension the device and method is enabling reconstructing the face and of approximately A3 dimension is enabling reconstructing the torso of subject (S).

The invention discloses a secondary forest structure parameter inversion method based on unmanned aerial vehicle stereo photogrammetry point cloud, and belongs to the fields of forest resource monitoring, ecological factor investigation, biodiversity research and the like. The method comprises the following steps: acquiring image data of a secondary forest by virtue of an unmanned aerial vehicle,and performing image matching and image splicing on the image data to obtain sparse point cloud; encrypting the sparse point cloud to obtain an encrypted point cloud; normalizing the encrypted point cloud by means of a digital terrain model obtained by a laser radar carried by the unmanned aerial vehicle, and obtaining normalized photogrammetric point cloud data; extracting point cloud characteristic variables from the normalized photogrammetric point cloud data; optimally selecting point cloud characteristic variables, establishing a multiple regression model by means of ground measured datato invert forest stand characteristics, and achieving high-quality inversion of forest structure parameters.

The invention provides devices, systems, and methods for detecting a 3-dimensional position of an object, and surgical automation involving the same. The surgical robot system may include a robot having a robot base, a robot arm coupled to the robot base, and an end-effector coupled to the robot arm. The end-effector, surgical instruments, the patient, and/or other objects to be tracked include active and/or passive tracking markers. Cameras, such as stereophotogrammetric infrared cameras, are able to detect the tracking markers, and the robot determines a 3-dimensional position of the objectfrom the tracking markers.

The invention is a stereophotogrammetry device intended to reduce the 3D surface reconstruction artefacts due to specular reflections when a unique camera body is used. Indeed, specular reflection of the camera flash on shiny objects are creating virtual objects in the scene inducing spikes in reconstruction. The device is constituted of a computing unit enabling 3D reconstruction, a unique camera body 5 equipped with a non-polarized double-optics OA and OB and two light sources 2A and 2B separated by the same distance as the double-optics and aligned with these such that 2A is aligned with OA and 2B is aligned with OB relative to the subject S. According to geometry considerations, the computing unit is defining the best matching amongst four possible matches relative to the specular spot position.