A detector (110) for determining a position of at least one object (118) is proposed. The detector (110) comprises: at least one optical sensor (112), the optical sensor (112) being configured to detect at least one light spot (156) generated by at least one light beam (150) propagating from the object (118) towards the detector (110), the optical sensor (112) having at least one matrix (152) of pixels (154), each pixel (154) being adapted to generate at least one pixel signal s.sub.i,j in response to an illumination of the pixel (154) by the light beam (150); at least one non-linearization device (123) configured to transform the pixel signals s.sub.i,j of all pixels (154) i, j or of at least one group of pixels (154) into nonlinear pixel signals s.sub.i,j, the nonlinear pixel signals s.sub.i,j each being a nonlinear function of the power of the illumination p.sub.i,j of the respective pixel (154); at least one summing device (125) configured to add up the nonlinearpixel signals s.sub.i,j of all pixels (154) i, j or of the at least one group of pixels (154) and to generate at least one nonlinearsum signal S=.sub.ijs.sub.ij; and at least one evaluation device (126), the evaluation device (126) being configured to determine at least one longitudinal coordinate z of the object (118) by evaluating the nonlinear sum signal S.

This disclosure provides systems, methods, and apparatuses for sensing a scene. In one aspect, a device may illuminate the scene using a sequence of two or more periods. Each period may include a transmission portion during which a plurality of light pulses are emitted onto the scene. Each period may include a non-transmission portion corresponding to an absence of emitted light. The device may receive, during each transmission portion, a plurality of light pulses reflected from the scene. The device may continuously accumulate photoelectric charge indicative of the received light pulses during an entirety of the sequence. The device may transfer the accumulated photoelectric charge to a readout circuit after an end of the sequence.

This disclosure provides systems, methods, and apparatuses for sensing a scene. In one aspect, a device may illuminate the scene using a sequence of two or more periods. Each period may include a transmission portion during which a plurality of light pulses are emitted onto the scene. Each period may include a non-transmission portion corresponding to an absence of emitted light. The device may receive, during each transmission portion, a plurality of light pulses reflected from the scene. The device may continuously accumulate photoelectric charge indicative of the received light pulses during an entirety of the sequence. The device may transfer the accumulated photoelectric charge to a readout circuit after an end of the sequence.

Embodiments of the present application disclose a map generation system and method. By scanning or processing an article in an article shelf, the technical solution of an embodiment of the present application may take as a position of the article a position of a handheld terminal at the time of the scanning or the processing, or take as the position of the article a position of a wireless apparatus corresponding to the scanned or processed article, to generate a navigation map according to the position of each article. The embodiment of the present application realizes the automatic generation of the map and improves the accuracy of drawing the map.

Embodiments of the present application disclose a map generation system and method. By scanning or processing an article in an article shelf, the technical solution of an embodiment of the present application may take as a position of the article a position of a handheld terminal at the time of the scanning or the processing, or take as the position of the article a position of a wireless apparatus corresponding to the scanned or processed article, to generate a navigation map according to the position of each article. The embodiment of the present application realizes the automatic generation of the map and improves the accuracy of drawing the map.

A machine-tool including a machining module equipped with a tool-holder and a work-holder, and an optical measuring device-for the three-dimensional measurement of the relative position between the tool-holder and the work-holder. The optical measuring device includes an optical system mounted on the work-holder and a target mounted on the tool-holder. The target includes a useful face forming a positioning reference that can be placed in the optical axis of the optical system.

A machine-tool including a machining module equipped with a tool-holder and a work-holder, and an optical measuring device-for the three-dimensional measurement of the relative position between the tool-holder and the work-holder. The optical measuring device includes an optical system mounted on the work-holder and a target mounted on the tool-holder. The target includes a useful face forming a positioning reference that can be placed in the optical axis of the optical system.

This distance measuring camera contains: a first optical system for collecting light from a subject to form a first subject image, a second optical system for collecting the light from the subject to form a second subject image, an imaging unit for imaging the first subject image formed by the first optical system and the second subject image formed by the second optical system, and a distance calculating part 4 for calculating a distance to the subject based on the first subject image and second subject image imaged by the imaging part. The distance calculating part 4 calculates the distance to the subject based on an image magnification ratio between a magnification of the first subject image and a magnification of the second subject image.

The present disclosure discloses an obstacle avoidance method and apparatus and an unmanned aerial vehicle. The method includes: obtaining detection images of at least two different focal lengths from a camera apparatus; determining, according to the detection images of the at least two different focal lengths, that an obstacle exists in a detection area; and obtaining position information of the obstacle according to the detection images of the at least two different focal lengths. Because the camera apparatus performs a zooming operation quickly, it's no need to precisely obtain position and attitude information by using a Global Positioning System (GPS) and an onboard inertial device, which avoids measurement interference and a positioning error caused by the inertial device, thereby improves calculation precision.

A distance measuring camera 1 includes a first optical system for collecting light from a subject to form a first subject image, a second optical system for collecting the light from the subject to form a second subject image, an imaging part for imaging the first subject image formed by the first optical system and the second subject image formed by the second optical system, and a distance calculating part 4 for calculating a distance to the subject based on the first subject image and the second subject image imaged by the imaging part S. The first optical system and the second optical system are configured so that a change of a magnification of the first subject image according to the distance to the subject is different from a change of a magnification of the second subject image according to the distance to the subject.