Navigation data offline updating method and device as well as hybrid navigation system

Abstract

The invention discloses a navigation data offline updating method and device as well as a hybrid navigation system. The method comprises the following steps: obtaining each frame of image in an imagefile acquired from the field and a corresponding coordinate thereof; extracting speed limit information of a sign in the image frame; determining a road line corresponding to the sign in navigation data according to the coordinate of the image frame corresponding to the sign; determining whether the point speed limit on the road line corresponding to the sign is updated or not according to point speed limit on the road line corresponding to the sign and speed limit information of the signal. The navigation data offline updating method and device as well as the hybrid navigation system disclosed by the invention have the benefits that navigation elements are acquired and made by utilizing a natural scene image acquired from the field; a data source can be extended to a non-professional acquisition channel; the acquisition pressure of field operators can be reduced; acquisition items during the complex road operation are shared, so that the operators can focus more on the job quality ofcomplex data; a knowledge base is synchronously supplemented, so that the waste of a data source is avoided.

Description

technical field [0001] The invention relates to the field of navigation electronic maps, in particular to a navigation data off-line update method, device and hybrid navigation system. Background technique [0002] The existing navigation data update needs to update the navigation data online during the field data collection process, and complete the data collection and data update at the same time, which increases the work tasks of field data collection personnel and reduces the efficiency of field data collection. [0003] Furthermore, the navigation data collection and production platform can carry out the offline production of some traffic signs with image recognition technology. Through image recognition technology, some navigation elements can be collected and updated in natural scene photos. This collection method can reduce the collection pressure of on-site operators and share The collection item when operating in complex road conditions enables operators to pay mor...

AI Technical Summary

Problems solved by technology

[0004] The inventors of the present invention found that: the existing web-based collection and production platform cannot read the video sequence of the camera in real time, cannot perform real-time image processing, and cannot perform collection and update of navigation elements

[0005] In the navigation data, the point speed limit is an important parameter of the navigation data, and the speed limit sign in the identified traffic sign can be used as the basis for updating the navigation data, but there is no traffic sign produced offline to verify the navigation in the prior art. Data is updated offline

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