An indoor positioning method based on image visual features. A Wi-Fi signal strength value of a Wi-Fi tag closest to a current location of a mobile device is matched with a signal strength list in a map database to obtain a first location of a first Wi-Fi tag with the greatest matching degree. A SURF descriptor of an image of the Wi-Fi tag closest to the current location of the mobile device is matched with SURF descriptors recorded in the signal strength list in the map database to discover an image of a Wi-Fi tag with the greatest matching degree, thereby obtaining a second location of a second Wi-Fi tag corresponding to the image of the Wi-Fi tag with the greatest matching degree. A three location of a three Wi-Fi tag is obtained according to a homography matrix corresponding to the image of the Wi-Fi tag with the largest matching degree and an empirical value of a positioning error. Positioning information of the mobile device is obtained according to the first location, the second location and the third location.

A method of operation of a navigation system includes: determining a geographic location, of a vehicle, while a global positioning location is blocked by an obstruction and the geographic location is from an in-vehicle location sensor in the vehicle; extracting an image line from a surrounding image with an artificial intelligence model and the surrounding image is from an in-vehicle image sensor in the vehicle; transforming an image coordinate of the image line to a world coordinate of a HD map local storage based on the geographic location; extracting a map line from the HD map local storage based on the world coordinate; determining a pose relationship between the image line and the map line paired as either horizontal or vertical; generating a map-related location for the vehicle based the geographic location and the pose relationship; and communicating the map-related location for displaying on a user interface.

A laser rangefinder may include a housing supporting an objective optic, an eyepiece optic, and a view-thru display. The view-thru display may be located along an optical path between the objective optic and the eyepiece optic. The view-thru display may comprise a first transparent sheet and a plurality of electrodes disposed on a first inner surface of the first transparent sheet. The view-thru display may be disposed rearward of the objective optic and the eyepiece optic may be disposed rearward of the view-thru display assembly so that a scene or subject can be viewed through the eyepiece optic and a plurality of display elements selectively displayed by the view-thru display assembly are superimposed on the scene or subject being viewed. Information regarding wind in proximity to the laser rangefinder may be presented on the view-thru display.

Disclosed are GPS-based target tracking system, method and dome camera. The system comprises: a first camera and a second camera. The first camera obtains GPS coordinate of a target during the tracking of the target and sends the GPS coordinates to the second camera. The second camera adjusts a shooting angle of the second camera according to the GPS coordinates, and tracks the target after detecting the target in a second monitoring image shot by the second camera. Therefore, in the scheme, if the target moves out of the monitoring range of the first camera, the second camera continues to track the target, namely the tracking range of the target is expanded through linkage of the plurality of cameras.

A three-dimensional data creation method in a client device includes: creating three-dimensional data of a surrounding area of the client device using sensor information that is obtained through a sensor equipped in the client device and indicates a surrounding condition of the client device; estimating a self-location of the client device using the three-dimensional data created; and transmitting the sensor information obtained to a server or an other client device.

A satellite with a primary imaging mirror fabricated while in space is described. The primary mirror is formed by solidifying liquid precursor material which assumes a paraboloid shape upon certain rotational maneuvers of the satellite. The primary mirror is preferably formed from a molten metal which creates a rigid paraboloid primary mirror upon solidification. The mirror material can be pre-melted prior to launch and carried to orbit while liquid, or it can be stored as a solid and melted in space to create the mirror.

A distribution device (10) is provided with an acquisition unit (11) which acquires position information of an obstacle, and a distribution unit (12) which wirelessly distributes, from the obstacle to an aircraft, obstacle information including the acquired position information of the obstacle and identification information of the obstacle. The distribution device (10) distributes the identification information of the obstacle along with the position information of the obstacle to the aircraft, and the aircraft interprets the position, etc., of the specific obstacle.

A computer is programmed to determine a localization of a first vehicle, including location coordinates and an orientation of the first vehicle, based on first vehicle sensor data, and to wirelessly receive localizations of respective second vehicles, wherein a first vehicle field of view at least partially overlaps respective fields of view of each of the second vehicles. The computer is programmed to determine pair-wise localizations for respective pairs of the first vehicle and one of the second vehicles, wherein each of the pair-wise localizations defines a localization of the first vehicle relative to a global coordinate system based on a (a) relative localization of the first vehicle with reference to the respective second vehicle and (b) a second vehicle localization relative to the global coordinate system, and to determine an adjusted localization for the first vehicle that has a minimized sum of distances to the pair-wise localizations.

A scanning device for use in gathering data relating to crops is described including: at least one camera; and a stroboscopic light source is associated with each at least one camera; the device is arranged to be moved around an area where a crop is grown and includes a means for determining the location of the device in the area; the device being arranged to take images of the crop from the at least one camera in synchrony with the stroboscopic light source as the device moves around the area; and wherein the stroboscopic light source has a light output of greater than 6×10.sup.−5 joules/cm.sup.2 (at 2 feet).

A method includes, by a mobile device, receiving a Global Navigation Satellite System (GNSS) signal, and receiving, from a wireless device, via a PC5 interface, a message including a location of a reference structure, a calculated location of the mobile device, or a combination thereof. The method also includes determine whether the GNSS signal is a spoofing signal based on: a spoof indication of the GNSS signal, and whether a difference between a location of the mobile device determined based on the GNSS signal and one of the location of the reference structure, the calculated location of the mobile device, or a location of the mobile device determined based on the location of the reference structure is greater than a threshold value.