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Method for preventing picture display characters from being mutually overlapped in navigation system

A screen display and navigation system technology, applied in navigation, surveying and mapping and navigation, road network navigator, etc., can solve problems such as capping, achieve the effects of improving performance, reducing performance overhead, and improving display quality

Inactive Publication Date: 2012-01-11
CHANGSHU HENGJI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is: to provide a navigation system to prevent the screen display characters from overlapping each other.

Method used

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  • Method for preventing picture display characters from being mutually overlapped in navigation system
  • Method for preventing picture display characters from being mutually overlapped in navigation system
  • Method for preventing picture display characters from being mutually overlapped in navigation system

Examples

Experimental program
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Embodiment Construction

[0020] like Figure 4 As shown, the implementation of the present invention includes the following steps:

[0021] 1) Set text display priority

[0022] For display text data, set its display priority in the navigation screen according to its type, and sort the data in order of priority from high to low. The text display priority is determined by its original category, for example, the priority of a text whose category is a gas station is higher than that of a text whose category is a leisure place. There are two purposes for setting the text display priority. One is to prioritize the text with higher display priority and add the text data with higher priority to the spatial index collection first. Delete the basis of judgment, and only delete the text with lower display priority.

[0023] 2) Carry out stamping judgment and processing on the displayed text data sorted according to the priority one by one, if all displayed texts have been processed, then go to step 8), other...

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Abstract

The invention provides a method for preventing picture display characters from being mutually overlapped in a navigation system, comprising the following steps of: 1) setting a characters displaying priority: setting the priority of the characters in the picture display according to the types of the display characters, and sequencing; 2) building spatial index for sequenced data according to the longitude and latitude coordinates of the data; 3) obtaining the other characters in a region around the characters by the spatial index for processing the characters, and judging whether the characters are overlapped; 4) according to the overlapping condition, moving the characters coordinates in a stated range, and recursively judging whether the characters are overlapped and moving the coordinates, until that the characters are not overlapped with the surrounding characters, or even if the characters coordinates reach the maximum moving quantity, the characters are still overlapped, namely,the process is unsuccessful; and 5) judging whether can cancel the characters which are unsuccessfully processed according to the priority of the characters. The method can effectively solve the problem that the Chinese characters of display picture in a navigator are mutually overlapped, and can effectively improve the effect and the quality of the picture display.

Description

technical field [0001] The invention relates to a processing method for navigation electronic map data, in particular to a processing method for character display. Background technique [0002] When the navigation system is displaying a map, if there are too many text information in the geographical area displayed on the screen, or there are several texts to be displayed at the same coordinate position, these two situations often cause the texts to overlap each other. On the one hand, the screen display will bring a complicated feeling to the user, or the information that the user cares about will be covered, so that he cannot get the information he needs; In the reading of map data, the amount of redundant data will cause the situation that the map movement and display are not smooth. Therefore, solving this problem is one of the important functions that an excellent car navigation device should have. [0003] Solving the text overlay problem can be handled by the navigat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01C21/00G01C21/36
Inventor 朱敦尧刘记杨继平
Owner CHANGSHU HENGJI TECH
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