A distance measurement apparatus includes: a control unit that makes an imaging unit acquire a plurality of first captured images corresponding to light patterns when making an optical system set the focal length to a first focal length, and that makes the imaging unit acquire second captured images corresponding to the light patterns when making the optical system set the focal length to a second focal length; a first distance measurement unit that determines presence or absence of an image blur and acquires a first distance to a subject from an image blur index value indicating an extent of the image blur; a second distance measurement unit that acquires a second distance to the subject based on triangulation; and a measurement result synthesis unit that outputs the first distance for a pixel with the image blur and that outputs the second distance for a pixel with no image blur.

The present invention relates to a measurement system 1 comprising an angle measuring unit 2 having at least one sensor 3, a reflective element 4 opposite to the angle measuring unit 2, at least one first light source 5 arranged on the side of the angle measuring unit 2 and at least one second light source 6, 6 arranged on the side of the reflective element 4. The at least one first light source 5 is designed to emit light via the reflective element 4 to the at least one sensor 3. The at least one second light source is designed to emit light to the at least one sensor 3. The angle measuring unit 2 is designed to determine at least one angle of incidence .sub.1 of the light of each first light source 5 on the at least one sensor 3 and at least one angle of incidence .sub.1, .sub.1 of the light of each second light source 6, 6 on the at least one sensor 3 and to calculate positioning information of the reflective element 4 from the determined angles of incidence .sub.1, .sub.1, .sub.1. The present invention also relates to a corresponding measuring method.

The present invention relates to a measurement system 1 comprising an angle measuring unit 2 having at least one sensor 3, a reflective element 4 opposite to the angle measuring unit 2, at least one first light source 5 arranged on the side of the angle measuring unit 2 and at least one second light source 6, 6 arranged on the side of the reflective element 4. The at least one first light source 5 is designed to emit light via the reflective element 4 to the at least one sensor 3. The at least one second light source is designed to emit light to the at least one sensor 3. The angle measuring unit 2 is designed to determine at least one angle of incidence .sub.1 of the light of each first light source 5 on the at least one sensor 3 and at least one angle of incidence .sub.1, .sub.1 of the light of each second light source 6, 6 on the at least one sensor 3 and to calculate positioning information of the reflective element 4 from the determined angles of incidence .sub.1, .sub.1, .sub.1. The present invention also relates to a corresponding measuring method.

The invention relates to a calibration tool and a method for calibrating a laser-triangulation measuring system, wherein the calibration tool comprises a tool body that defines a reference plane and that is rotatable relative to the measuring system about a rotation axis perpendicular to said reference plane, wherein the tool body is provided with one or more calibration surfaces that define a pattern of calibration positions, wherein the pattern comprises at least three columns extending in a radial direction away from the rotation axis and at least three rows extending in a circumferential direction about the rotation axis, wherein for each column the calibration positions within said respective column vary in height relative to the reference plane in a height direction perpendicular to said reference plane and wherein for each row the calibration positions within the respective row vary in height in the height direction relative to the reference plane.

A depth information acquiring apparatus using a digital micro-mirror device (DMD), and a method thereof are provided. The depth information obtaining apparatus includes: a first digital micro-mirror device (DMD) that generates first line light and irradiates the first line light to an object; a second DMD that receives second line light reflected from the object and reflects light corresponding to the second line light; a sensor that senses light reflected by the second DMD; and a controller that controls operations of the first and second DMDs, and calculates depth information of the object by using information with respect to light sensed by the sensor.

A depth information acquiring apparatus using a digital micro-mirror device (DMD), and a method thereof are provided. The depth information obtaining apparatus includes: a first digital micro-mirror device (DMD) that generates first line light and irradiates the first line light to an object; a second DMD that receives second line light reflected from the object and reflects light corresponding to the second line light; a sensor that senses light reflected by the second DMD; and a controller that controls operations of the first and second DMDs, and calculates depth information of the object by using information with respect to light sensed by the sensor.

A distance meter is provided. The distance meter includes a lens module, at least one optical functional device, an image sensing device, and a processor. The lens module has a view angle and a central point and receives a main image light of an object and an auxiliary image light of the object. The at least one optical functional device is disposed in the view angle of the lens module. The main image light forms a main image on the image sensing device. The auxiliary image light forms at least one auxiliary image correspondingly on the image sensing device through the at least one optical functional device. The processor is electrically connected to the image sensing device. The processor determines a distance between the object and the central point according to image positions of the main image and the at least one auxiliary image.

A distance meter is provided. The distance meter includes a lens module, at least one optical functional device, an image sensing device, and a processor. The lens module has a view angle and a central point and receives a main image light of an object and an auxiliary image light of the object. The at least one optical functional device is disposed in the view angle of the lens module. The main image light forms a main image on the image sensing device. The auxiliary image light forms at least one auxiliary image correspondingly on the image sensing device through the at least one optical functional device. The processor is electrically connected to the image sensing device. The processor determines a distance between the object and the central point according to image positions of the main image and the at least one auxiliary image.

A three-dimensional imaging and display system is provided in which input is optically detected in an imaging volume by measuring the path length of an amplitude modulated scanning beam as a function of the phase shift thereof. Visual image feedback concerning the detected input is presented.

A method of determining the distance of an object from an automated vehicle based on images taken by a monocular image acquiring device. The object is recognized with an object-class by means of an image processing system. Respective position data are determined from the images using a pinhole camera model based on the object-class. Position data indicating in world coordinates the position of a reference point of the object with respect to the plane of the road is used with a scaling factor of the pinhole camera model estimated by means of a Bayes estimator using the position data as observations and under the assumption that the reference point of the object is located on the plane of the road with a predefined probability. The distance of the object from the automated vehicle is calculated from the estimated scaling factor using the pinhole camera model.