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Method and device for generating map tiles in parallel through massive remote sensing images

A remote sensing image and map generation technology, which is applied in the field of image processing, can solve problems affecting tile efficiency and achieve the effects of flexible methods, improved efficiency, and breakthrough requirements

Pending Publication Date: 2021-02-19
BEIJING AEROSPACE TITAN TECH CO LTD
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  • Application Information

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Problems solved by technology

However, the above-mentioned related technologies require that orthophotos must have the same reference coordinate system and can be spliced ​​into a large image to be used as a tile data source, which makes the existing tile generation technology have certain limitations in the use of data sources. Restrictive, which ultimately affects the efficiency of tile generation

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  • Method and device for generating map tiles in parallel through massive remote sensing images
  • Method and device for generating map tiles in parallel through massive remote sensing images
  • Method and device for generating map tiles in parallel through massive remote sensing images

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Embodiment Construction

[0057] Various exemplary embodiments, features, and aspects of the present application will be described in detail below with reference to the accompanying drawings. The same reference numbers in the figures indicate functionally identical or similar elements. While various aspects of the embodiments are shown in drawings, the drawings are not necessarily drawn to scale unless specifically indicated.

[0058] The word "exemplary" is used exclusively herein to mean "serving as an example, embodiment, or illustration." Any embodiment described herein as "exemplary" is not necessarily to be construed as superior or better than other embodiments.

[0059] In addition, in order to better illustrate the present application, numerous specific details are given in the following specific implementation manners. It will be understood by those skilled in the art that the present application may be practiced without certain of the specific details. In some instances, methods, means, co...

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Abstract

The invention relates to a method for parallel generation of map tiles from massive remote sensing images, and the method comprises a tile creation stage: a first processor determines a top tile levelbased on an input data source, and determines an initial tile level according to the top tile level; slice processors running in parallel carry out downward step-by-step recursive calculation from the initial tile level, and determine the initial slice level of each slice task in each slice processor; each slice processor slices the input data source according to the initial slice hierarchy to generate a corresponding image tile; a tile merging stage: the second processor allocates the received image tiles to each merging processor for tile merging according to the current number of the received image tiles and the number of the merging processors configured to run in parallel. Tile generation is divided into two stages of a tile creation stage and a tile merging stage, and the two stagesare carried out in a parallel mode, so that the remote sensing image slicing efficiency is greatly improved.

Description

technical field [0001] The present application relates to the technical field of image processing, in particular to a method and device for generating map tiles in parallel from massive remote sensing images. Background technique [0002] A map tile refers to a square grid image that cuts a map within a certain range into several rows and columns according to a certain size and format, zoom level or scale, and the sliced ​​positive direction grid image is visualized as a tile piece. Tiles are usually applied in the B / S software architecture. The browser obtains map data from the server. Compared with orthophoto maps, tiles have a smaller amount of data and faster query and retrieval. Therefore, they are an optimization strategy to improve the user experience of map browsing. With the development of remote sensing data acquisition technology, the data volume of remote sensing images is increasing exponentially. However, the existing tile generation technology is slow and ine...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T3/40G06T7/11G06T1/20
CPCG06T3/40G06T7/11G06T1/20G06T2207/10032
Inventor 韩冰谭靖李莹
Owner BEIJING AEROSPACE TITAN TECH CO LTD
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