A method for scanning and obtaining three-dimensional (3D)l coordinates is provided. The method includes providing a 3D measuring device having a projector, a first camera and a second camera. The method records images of a light pattern emitted by the projector onto an object. A deviation in a measured parameter from an expected parameter is determined. The calibration of the 3D measuring device may be changed when the deviation is outside of a predetermined threshold.

A measurement object surface is illuminated with a pattern sequence of various patterns using a projector, which is recorded with a camera system, and the 3D coordinates for the measurement points are determined by evaluation of the image sequence. While the image sequence is being recorded translational and/or rotational accelerations of the projector, the camera system and/or the measurement object are measured at least at a measurement rate such that in each case a plurality of values for the accelerations are acquired. It is thus possible, on the basis of the measured accelerations, to take into account algorithmically, when determining the 3D coordinates, movements of the projector, the camera system and/or the measurement object, which movements occur during the illumination times of the respective individual images of the image sequence and provoke unsteadiness and/or motion blur in the respective individual images of the image sequence.

A method is provided of determining three-dimensional coordinates of an object surface with a laser tracker and structured light scanner. The method includes providing the scanner having a body, a pair of cameras, a projector, and a processor. The projector and cameras are positioned in a non-collinear arrangement. The projector is configured to project a first pattern onto the surface. The method also includes providing the tracker which emits a beam of light onto the retroreflector. The tracker receives a reflected beam of light. The first location is measured with the tracker. The first orientation is measured with the tracker. The first surface pattern is projected onto the surface. A pair of images of the surface pattern is acquired with cameras. The processor determines the 3D coordinates of a first plurality of points in the tracker frame of reference based in part on epipolar constraints of the cameras and projector.

A laser projection system for projecting an image on a workpiece includes a photogrammetry assembly and a laser projector, each communicating with a computer. The photogrammetry assembly includes a first camera for scanning the workpiece, and the laser projector projects a laser image to arbitrary locations. Light is conveyed from the direction of the workpiece to the photogrammetry assembly. The photogrammetry assembly signals the coordinates light conveyed toward the photogrammetry assembly to the computer with the computer being programmable for determining a geometric location of the laser image. The computer establishes a geometric correlation between the photogrammetry assembly, the laser projector, and the workpiece for realigning the laser image to a corrected geometric location relative to the workpiece.

A method for correcting annular rotating body's surface shape data in correcting three-dimensional shape data on annular rotating body's surface, a reference line is set along the surface to detect the annular rotating body, and then reference equiangular division points are set. The circumferential length of reference line is calculated from distance between adjacent reference equiangular division points, and a plurality of reference equidistant division points, which divide reference line into equal lengths, are set on reference line. Then interpolation points for correction of data on surface to be detected of annular rotating body are set at positions a preset distance apart in radial direction of rotating body from the reference equidistant division points. Three-dimensional shape data at interpolation points are calculated using the three-dimensional data to be corrected. Finally interpolation points are moved onto a circle centered about rotational center and having same circumferential length as aforementioned circumferential length.

A device for scanning and obtaining three-dimensional coordinates is provided. The device may be a hand-held scanner that includes a carrying structure having a front and reverse side, the carrying structure having a first arm, a second arm and a third arm arranged in a T-shape or a Y-shape. A housing is coupled to the reverse side, a handle is positioned opposite the carrying structure, the housing and carrying structure defining an interior space. At least one projector is configured to project at least one pattern on an object, the projector being positioned within the interior space and oriented to project the at least one pattern from the front side. At least two cameras are provided spaced apart from each other, the cameras being configured to record images of the object. The cameras and projector are spaced apart from each other by a pre-determined distance.

A solution including a noncontact electronic measurement device is provided. The measurement device includes one or more imaging devices configured to acquire image data of a surface of an object located in a measurement region relative to the measurement device and one or more projected pattern generators configured to generate divergent pattern(s) of structured light, which impact the surface of the object within a field of view of the imaging device when the object is located in the measurement region. Using image data acquired by the imaging device(s), a computer system can measure a set of attributes of the surface of the object and/or automatically determine whether the measurement device is within the measurement region. An embodiment is configured to be held by a human user during operation.

A device for determining a dimension of a tool having a cutting edge includes a first light source configured to emit light parallel to a first axis, an image sensor which is associatable with a second axis extending orthogonally to the image sensor and an analyzing unit. The first axis and the second axis are inclined relative to each other. The device is configured such that the light emitted from the first light source is reflectable by the cutting edge of the tool in such a way that light spots arranged in a line on the image sensor are generatable by the reflected light. The analyzing unit is configured to determine positions of the light spots. The dimension of the tool is determinable based on the positions of the light spots.

One embodiment can provide a machine-vision system that includes one or more stereo-vision modules. A respective stereo-vision module can include a structured-light projector, a first camera positioned on a first side of the structured-light projector, and a second camera positioned on a second side of the structured-light projector. The first and second cameras are configured to capture images of an object under illumination by the structured-light projector. The structured-light projector can include a laser-based light source and an optical modulator configured to reduce speckles caused by the laser-based light source.

The disclosed apparatus, systems and methods relate to a vision system which improves the performance of depth cameras in communication with vision cameras and their ability to image and analyze surroundings.