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Automatic selection of orthogonal projecting inlay line and orthogonal projection image seamless inlay method

A technology of orthophoto and mosaic lines, which is applied in the field of remote sensing surveying and mapping, can solve the problems of high overlap, increase the workload of orthophoto mosaic processing, etc., and achieve the effect of improving production efficiency

Inactive Publication Date: 2008-11-12
WUHAN UNIV
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Problems solved by technology

At present, aerial digital imagery has become the most important data source for aerial survey production. Its high overlap and large-scale features greatly increase the workload of orthophoto mosaic processing.

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  • Automatic selection of orthogonal projecting inlay line and orthogonal projection image seamless inlay method
  • Automatic selection of orthogonal projecting inlay line and orthogonal projection image seamless inlay method
  • Automatic selection of orthogonal projecting inlay line and orthogonal projection image seamless inlay method

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Embodiment Construction

[0030] The method provided by the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0031] The present invention comprises the following steps:

[0032] 1. On the basis of completing the aerial image triangulation and digital ground model (DEM) collection, the original image is orthorectified to obtain a single orthophoto. Every two adjacent single orthophotos constitute an orthophoto pair to be mosaiced;

[0033] 2. Overlap the pair of orthophoto images to be mosaiced according to the ground coordinates to obtain the grayscale difference image of the overlapping area. Houses, tree crowns, etc., or ground objects with large imaging color contrast will have brighter grayscale characteristics on the difference image If it is shown, the brighter area on the difference image is the obstacle area of ​​the orthographic mosaic line;

[0034] Overlap the orthoimage pairs to be mosaicked for single-slice orthor...

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Abstract

The invention discloses a method for determining automatically mosaic line of orthophoto and performing automatic seamless mosaic of orthophoto, including selecting the optimum route to evade obstacle area in a difference image using the positive feedback of ant algorithm and elicitation type search characteristic of swarm intelligence; obtaining the mosaic lines of two orthophotoes to be spliced, performing mosaic fusion to the orthophoto pairs using the mosaic lines, thereby implementing the automatic seamless mosaic of orthophoto. The method which determines automatically the position of mosaic lines in the orthophoto mosaic process is capable of improving greatly the production efficiency of orthophoto map in mapping industry by replacing the prior method for determining or modifying mosaic lines manually, in which the mosaic lines evades automatically ground feature higher than the ground, such as houses, crown of trees, and the like, and evades the areas with large contrast of imaging colors in adjacent orthophoto maps.

Description

technical field [0001] The invention relates to an automatic selection of mosaic lines of orthophoto images and a method for seamless mosaic of orthophoto images, which is used for the production of orthophoto maps in the surveying and mapping industry, and belongs to the field of remote sensing surveying and mapping. Background technique [0002] In the process of orthophoto production, it is an important step to select the mosaic line on the single orthophoto generated by a single aerial or remote sensing image for mosaic operation. The existing domestic orthophoto (DOM) production software generally gives the first The initial position of the mosaic line, and then manually modify the mosaic line to avoid passing through houses, trees and other objects above the ground or areas with large grayscale contrast, such as VirtuoZo, JX4, etc. Although Pixel Factory, an internationally advanced DOM and True Ortho (true orthophoto) production software, has basically solved this pro...

Claims

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Application Information

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IPC IPC(8): G01C11/04G06T5/50
Inventor 孙明伟张祖勋张剑清
Owner WUHAN UNIV
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