Method for correcting the height model for navigation devices on the basis of 3-d landmarks
A navigation device, 3D technology, applied in the field of height model, can solve problems such as sinking into the ground 11 or floating on the ground 11
Inactive Publication Date: 2019-04-02
ROBERT BOSCH GMBH
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However, due to the height model and overlay of the 3D landmark 26, there may be situations where, to the viewer, in the display, it appears that the 3D landmark 26 is sinking into or floating on the ground 11
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[0026] figure 1 Shows where the navigator navigates figure 1 with a building 10 shown sunken in a ground 11 with a height profile, as already described in the introduction.
[0027] figure 2 A view of the corrected (by the method according to the invention) height profile of the supporting surface below the building 10 is shown. The ground 11 below the building 10 has been corrected so that the supporting surface is flat, so that the building 10 stands upright.
[0028] exist image 3 The navigation device 100 shown schematically in FIG. 2 has a computing unit 20 which includes a working memory 21 . Furthermore, there is a data memory 22 in the navigation device 100 , from which an altitude model 23 with an altitude profile 24 is uploaded to the working memory 21 for eg the current driving area. The height profile 24 is formed by a plurality of grid points 25 formed in a grid network, each grid point being assigned individual height information. At locations where grid ...
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The invention relates to a method for displaying a navigation map (1) for a navigation device (100), wherein the navigation map (1) shows spatial coordinates which have the height profile (24) superimposed thereon, and wherein the navigation map (1) furthermore has 3-D landmarks (26) which are displayed in conjunction with a height profile (24). According to the invention, the method for displaying the map includes at least the following steps: reading a height model (23) into a random access memory (21) of the navigation device (100), ascertaining all outlines of the 3-D landmark (26), afterwhich there is a determination of which grid points (25) of the height model (23) are covered by the relevant outline, correcting the height model (23) at the points at which it is covered by a 3-D landmark (26), reading the height values of the grid points (25) and, at least in part, of the eight further grid points (25) surrounding the grid points (25), calculating a mean value for the height value, assigning the calculated height value to all grid points (25) that are covered by the relevant 3-D landmark (26), assigning the calculated height value to all grid points (25) adjacent to the covered grid points (25) such that all grid points (25) under the relevant height model (23) have a uniform height in order to smooth this in the plane.
Description
technical field [0001] The present invention relates to a method for correcting a height model of a navigation device based on 3D landmarks according to claim 1 . Background technique [0002] In a navigation system, navigation data is presented graphically to the user as a map on a display. On a map, you can see planes such as building levels or water surfaces, lines such as road lines or rail lines, and points such as registered restaurants or gas stations. [0003] Older navigation devices only have a 2D view where the map is displayed orthographically from above. However, in newer systems there are also 3D views, where the map is tilted and displayed in perspective. [0004] In order to generate more realistic landscape images, these maps contain, in addition to area-related position information, a height model, the so-called digital terrain model (DTM). [0005] For example, DE 10 2013 212 035 A1 discloses a method for displaying representations of three-dimensional ...
Claims
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Login to View More IPC IPC(8): G01C21/36G06T17/05
CPCG01C21/3638G06T17/05G06T19/20G06T2219/2021
Inventor D·奥特
Owner ROBERT BOSCH GMBH