Systems, devices, and techniques related to matching features between a dynamic vision sensor and one or both of a dynamic projector or another dynamic vision sensor are discussed. Such techniques include casting a light pattern with projected features having differing temporal characteristics onto a scene and determining the correspondence(s) based on matching changes in detected luminance and temporal characteristics of the projected features.

An energy optimized imaging system that includes a light source that has the ability to illuminate specific pixels in a scene, and a sensor that has the ability to capture light with specific pixels of its sensor matrix, temporally synchronized such that the sensor captures light only when the light source is illuminating pixels in the scene.

A wired-rope measuring device, provided with two cameras 1, 2 that shoot one or no less than two wired ropes 8 from different directions and an analyzing device 5 that analyzes image data that is an image shot by the two cameras 1, 2, wherein the analyzing device 5 applies the principle of triangulation by a stereo method to the image data to seek a center coordinate P.sub.0 of the wired rope 8 relative to the cameras 1, 2 and volumetric anamorphosis is corrected when calculating a diameter D of the wired rope 8 based on the center coordinate P.sub.0 of the wired rope 8.

Disclosed are a method and apparatus for acquiring a three-dimensional image using two cameras. The method includes: acquiring image information of a target object using a first camera, and sending the acquired image information to an image signal processor; acquiring a phase grating image subjected to strip deformation in a picture space with an identical visual angle using a second camera, calculating depth data of the target object, and sending the depth data to the image signal processor; upon receipt of the image information and the depth data, if the image signal processor judges that the depth data is received, directly sending the depth data to a 3D image generating module, and if the image signal processor judges that the image information is received, performing routine image signal processing and sending the image information to the 3D image generating module; and synthesizing the depth data and the image information subjected to the image signal processing using the 3D image generating module to generate a 3D image.

An apparatus for intraoral scanning includes an elongate handheld wand that has a probe. One or more light projectors and two or more cameras are disposed within the probe. The light projectors each has a pattern generating optical element, which may use diffraction or refraction to form a light pattern. Each camera may be configured to focus between 1 mm and 30 mm from a lens that is farthest from the camera sensor. Other applications are also described.

A handheld wand comprises a probe at a distal end of the elongate handheld wand. The probe includes a light projector and a light field camera. The light projector includes a light source and a pattern generator configured to generate a light pattern. The light field camera includes a light field camera sensor, the light field camera sensor comprising an image sensor comprising an array of sensor pixels, and an array of micro-lenses disposed in front of the image sensor such that each micro-lens is disposed over a sub-array of the array of sensor pixels.

Systems, devices, and techniques related to matching features between a dynamic vision sensor and one or both of a dynamic projector or another dynamic vision sensor are discussed. Such techniques include casting a light pattern with projected features having differing temporal characteristics onto a scene and determining the correspondence(s) based on matching changes in detected luminance and temporal characteristics of the projected features.

A three-dimensional (3D) scanner having two cameras and a projector is detachably coupled to a device selected from the group consisting of: an articulated arm coordinate measuring machine, a camera assembly, a six degree-of-freedom (six-DOF) tracker target assembly, and a six-DOF light point target assembly.

A method of visualizing a plan in real dimensions, wherein, in a calibration step, using a grid reflection method, a transmission pattern is projected onto a projection surface by means of a projection unit, and a reception pattern reflected from the projection surface is detected by at least two sensor units, and a surface shape and a location of the projection surface in relation to a position of the projection unit and to a position of the sensor units are detected by means of a computer unit connected to the projection unit and the sensor units, based on a distortion of the reception pattern in comparison to the transmission pattern, and a projection distortion is performed on the plan by means of the computer unit based on the surface shape and the location of the projection surface in relation to the projection unit, as detected in the calibration step, and the distorted plan is projected by the projection unit onto the projection surface in such a way that the projected plan on the projection surface corresponds to an undistorted, plane representation of the plan in real dimensions.

A 3D image-capturing device that includes at least one camera that acquires a 2D image and distance information of an object, a monitor that displays the 2D image acquired by the camera, and at least one processor including hardware. The processor acquires a first area for which the distance information is not required in the 2D image displayed on the monitor, and sets an image-capturing condition so that the amount of distance information acquired by the camera in the acquired first area is less than or equal to a prescribed first threshold and the amount of distance information acquired by the camera in a second area, which is at least part of an area other than the first area, is greater than a prescribed second threshold that is larger than the first threshold.