A machine control device includes an imaging control unit that controls an imaging device to capture two images at two different imaging positions; an imaging position information acquiring unit that acquires positional information of two imaging positions; a measurement distance restoring unit that restores a measurement distance of an object based on two images, distance information between two imaging positions, and a parameter of the imaging device, by using a stereo camera method; a measurement precision calculating unit that calculates a measurement precision of the measurement distance of the object based on two images, the distance information between two imaging positions, and the parameter of the imaging device; an area specifying unit that specifies a partial area of the object as a specified area; and a measurement precision determining unit that determines whether the measurement precision of the object satisfies a predetermined precision in the specified area.

A surgical system is provided. The surgical system includes a camera operable to capture images and/or video. A projector is operable to project light, and a controller is communicatively coupled with the camera and the projector. The controller is operable to track movement of bone in real-time during surgery based on the images and/or video captured by the camera, and control the projector to project the light including a cutting line on the bone to indicate a cutting plane for cutting the bone during surgery.

The present invention provides: a stage device that can suppress bending deformation of a mirror, and that can reduce the positioning error of a stage by reducing the measurement error of the position of the stage; and a charged particle beam device comprising this stage device. The stage device according to the present invention comprises: a table (105) on which a sample (106) is placed; a bar mirror (111) installed on the table (105); a laser interferometer (104) that irradiates the bar mirror (111) with laser light and receives reflected light from the bar mirror (111), thereby measuring the position of the table (105); a drive mechanism (103) that moves the table (105); and a plurality of elastic members (203) installed between the bar mirror (111) and the table (105)

A three-dimensional target capable of serving as a positioning reference, including, on a useful face, a first structure and a second structure. The first structure defines a planar reference face divided up between at least a first portion whose surface is reflective according to a diffuse reflection, and a second portion whose surface is reflective according to a specular reflection, the second portion being divided up according to a series of localized zones positioned in the first portion. The second structure has an inclined face relative to the planar reference face. Applicable to three-dimensional optical measurement of the relative position between a first object and a second object.

A self-leveling laser transmitter is provided. The laser transmitter comprises a rotation head and an accelerometer mounted on the rotation head. An acceleration signal is received from the accelerometer and one or more tilt adjustment signals for adjusting a tilt of the rotation head to a leveled orientation are generated based on the acceleration signal. One or more actuators adjust the tilt of the rotation head based on the one or more tilt adjustment signals.

A system and method for measuring three-dimensional (3D) coordinate values of an environment is provided. The method including moving a 2D scanner through the environment. A 2D map of the environment is generated using the 2D scanner. A path is defined through the environment using the 2D scanner. 3D scan locations along the path are defined using the 2D scanner. The 2D scanner is operably coupled to a mobile base unit. The mobile base unit is moved along the path based at least in part on the 2D map and the defined path. 3D coordinate values are measured at the 3D scan locations with a 3D scanner, the 3D scanner being coupled to the mobile base unit.

A system and a method for optically detecting a pose of at least one instrument in an operating theater are provided. The method includes determining pose information of the at least one instrument with an optical pose detection device of a surgical microscope or with a microscope-external optical pose detection device, determining whether the pose information is biunique or whether a biunique determination of the pose of the instrument is possible, and evaluating additional information for determining additional pose information, at least for a case where no biunique determination of the pose is possible.

A method for measuring geometric errors of a numerical control turntable based on a four-station laser tracer system includes: establishing a self-calibration coordinate system and calibrating positions of tracking interferometers; respectively placing each of target lenses at three non-coplanar points that are above the numerical control turntable and keep certain distances from the numerical control turntable, controlling the numerical control turntable to rotate at a certain angular interval θ.sub.j, and based on positions of the tracking interferometers being known after calibration, solving coordinates of each of measurement points in the self-calibration coordinate system using a non-linear least square method; establishing a turntable coordinate system; perform a conversion between the turntable coordinate system and the self-calibration coordinate system; separating six geometric errors of the numerical control turntable using spatial position errors of the three points at a same position and using the linear least squares method.

A six DOF measurement aid module for determining 3D coordinates of points to be measured of an object surface, comprising a laser tracker for determining the position and orientation of the six DOF measurement aid module. The six DOF measurement aid module has a body comprising an object coupling device with an object interface, configured to couple, via the object interface, alternatively both a handle to the body with a fixed pose and the body to a mobile platform with a fixed pose, a sensor attachment coupling device with a sensor interface-configured to couple alternatively both a sensor attachment effecting non-contact measurement and a sensor attachment effecting tactile measurement to the body with a fixed pose via the sensor interface, and visual markings, which are arranged in a defined spatial relationship in a manner forming a pattern in a marking region on the body.

A novel multiple camera calibration algorithm uses human joint points for matched key points. A recent machine-learning based human joint detector provides joint positions with labels (e.g. left wrist, right knee, and others). In single person situation, it directly provides matched key points between multiple cameras. Thus, the algorithm does not suffer a key-point matching problem, even in a very sparse camera configuration, which is challenging in the traditional image feature-based method. This algorithm provides easy setup for a multiple camera configuration for marker-less pose estimation.