Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Geographic information image compression method

A technology of geographic information and compression method, which is applied in the field of geographic information image compression, can solve problems affecting the use effect of geographic information images, and achieve the effect of reduced calculation amount and high operation speed

Inactive Publication Date: 2017-04-05
TIANJIN TIANXI GUORUI TECH DEV CO LTD
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although computer hardware technology has developed rapidly, when these geographic information images are expected to be widely used on the network, the performance limitations of network bandwidth and terminal equipment will still affect the use of these geographic information images

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Geographic information image compression method
  • Geographic information image compression method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0016] refer to figure 1 As shown, the present invention proposes a kind of compression method of geographical information image, comprises the following steps:

[0017] In the image preprocessing step, the geographic information image is obtained, and the geographic information image is divided into blocks according to the terrain law in the geographic information image. In one embodiment, the terrain law includes the ruggedness of the terrain, which can be defined in the following manner: in a selected area, the area whose altitude is within the range of ±1096 of the average altitude of the area percentage of the total area of ​​the region. When the ratio is above 7096, the roughness of the area is flat. When the ratio is between 30% and 70%. Yes, the area is moderately rough. When the ratio is below 3096, the area is highly rugged. In one embodiment, another factor that needs to be considered in the terrain law is the division of administrative regions. Usually, rough...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a geographic information image compression method comprising the following steps: an image preprocessing step used for obtaining a geographic information image and segmenting the geographic information image according to landform rules in the geographic information image, wherein the landform rules comprise landform roughness grade; an image transformation step using two dimension wavelet transformation to transform each segment, wherein the two dimension wavelet transformation uses biorthogonal wavelets and is decomposed into two times of one-dimensional wavelet transformations for processing, the two times of one-dimensional wavelet transformations comprise low frequency data transformation and high frequency data transformation, and parallel processing of the high and low frequency data transformations can be realized; an image encoding step used for quantifying the image converted by the two dimension wavelet transformation, and encoding the converted image, wherein the encoding step uses an ECBOT algorithm. The geographic information image compression method can reduce the image processing computational complexity, is high in operation speed, and the image quality is not substantially affected.

Description

technical field [0001] The invention relates to geographic information processing technology, in particular to a method for compressing geographic information images. Background technique [0002] The application of geographic information system (GIS) is developing rapidly. The basis of GIS is high-definition, high-resolution and highly accurate electronic maps. Electronic maps can display three-dimensional terrain and are of great value in military simulation, urban planning, digital technology applications and other fields. [0003] High-definition and high-resolution electronic maps mean geographic information images with a huge amount of data. When using these images, the computer needs to have a large memory capacity and storage space, as well as a strong computing power. Although computer hardware technology has developed rapidly, when these geographic information images are expected to be widely used on the network, the performance limitations of network bandwidth ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G06T9/00G06F17/30
CPCG06T9/007G06F16/29G06F16/50
Inventor 李春
Owner TIANJIN TIANXI GUORUI TECH DEV CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com