36results about How to "Avoid false matches" patented technology

The invention discloses a method and a device of updating map data, wherein, each place in the map not only is related to geographic data, but also is related to at least one scene image pictured in the place. The method comprises: collecting video data and the geographic data representing location of the place in each place; extracting a representative area representing the place from the scene image based on predetermined standards and making the representative area related to the place; extracting an image pictured in the place from the video data based on the location of the place; matching the representative area and the extracted image and generating a matching result; in the condition that the matching result shows the map data need to be updated, making the image matched with the representative area as an update image to update the scene image. Making use of the invention can rapidly update the map data, so as to provide up-to-date geographic data for users.

A transmission side transmits the road shape data of an object road 101 to be transmitted, and the branch shape data of a branch 20 intersecting with or branching from the object road 101. A reception side specifies the object road 101 on its own digital map with reference to the branch 20. In this method, the information indicating the shape of a branch or an intersection, which is liable to be erroneously identified, is transmitted as branch shape data to the reception side, so that the reception side can avoid the erroneous location identification. The branch shape 20 makes it possible to discriminate the object road 101 and a parallel road and to discriminate a discrepancy in the longitudinal direction of the object road 101, so that the erroneous location identification to the parallel road or the erroneous location identification in the longitudinal direction of the object road 101 can also be prevented.

Disclosed is an automatic registration method of aviation and ground LiDAR data based on building contour constraint. The method includes firstly extracting building contours or aviation contours and ground contours for short from aviation and ground LiDAR data; extracting building angular points or aviation angular points and ground angular points for short from the aviation contours and the ground contours; taking the matching degree between the aviation contours and the ground contours as constraint, calculating initial transfer matrixes between the aviation angular points and the ground angular points, and obtaining initial matching angle dot pairs; finally, calculating correction transfer matrixes between the initial matching angle dot pairs by using an iterative closest point (ICP) algorithm, and converting ground dot cloud data to be matched through the initial transfer matrixes and the correction transfer matrixes successively to achieve automatic high-precision registration of the aviation and ground LiDAR data. The method has great advantages in registration reliability and accuracy with contour lines serving as constraint; and simultaneously, based on LiDAR data to be matched and reference LiDAR data, accuracy registration between the aviation and ground LiDAR data can be achieved without other auxiliary data.

The invention provides a seamless automatic image splicing method resistant to subtitle interference. By means of the method, video frames (such as video frames or multiple continuous images shot by a continuously moving or rotating camera) in a varied scene can be continuously spliced to form a complete image. Camera position and pose and scene control point information, proportion and perspective transformation are not required, and rotation of videos (or image sequences) at any angle is not required to be considered, full-automatic color video image seamless splicing is achieved, various high-saliency associated information among the image sequences is fully utilized to perform automatic splicing calculation, the splicing accuracy of adjacent frames can reach to sub pixel, and a parallel technology can be utilized to improve the splicing speed in multiples.

The invention discloses a system for improving contact efficiency between a driver and a passenger. The system comprises a taxi dispatching system, an intelligent mobile terminal and a vehicle-mounted intelligent navigation unit. The taxi dispatching system is used for checking information like plate number information and real-time position information of a task taxi, and pushing the information to the intelligent mobile terminal. The intelligent mobile terminal is used for receiving the information pushed by the taxi dispatching system and reminding the passenger of turning on a flash screen or not according to the pushed information. The vehicle-mounted intelligent navigation unit is used for sending vehicle real-time position information to the taxi dispatching system, and receiving order information and designated colors of the flash screen pushed by the taxi dispatching system. The invention further discloses a method for improving the contact efficiency between the driver and the passenger. According to the system and the method for improving the contact efficiency between the driver and the passenger, the flash screen designated colors is pushed to the intelligent mobile terminal of the passenger and the vehicle-mounted intelligent navigation unit of the taxi by grasp of two-way data, namely, grasp of passenger information and grasp of taxi information, of the taxi dispatching system, consequently, quick matching between the driver and passenger can be achieved based on the flash screen designated colors, and therefore the contact efficiency and accuracy between the driver and passenger can be improved.