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Aerial photography image and geographical data splicing method based on ORB feature matching

An aerial image and feature matching technology, which is used in image data processing, image enhancement, image analysis, etc.

Active Publication Date: 2016-10-12
THE 28TH RES INST OF CHINA ELECTRONICS TECH GROUP CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In recent years, a large number of stitching algorithms based on SIFT / SURF / ORB / Harris detection have been proposed, but many of them only process the image itself

Method used

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  • Aerial photography image and geographical data splicing method based on ORB feature matching
  • Aerial photography image and geographical data splicing method based on ORB feature matching
  • Aerial photography image and geographical data splicing method based on ORB feature matching

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Experimental program
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Embodiment

[0105] This embodiment includes the following processing steps:

[0106] 1. Read the geographic information and the image into the memory together to obtain the image to be spliced ​​and the matrix storing the latitude and longitude information, and store the geographic information in a 2-dimensional double-precision floating-point matrix. In order to facilitate image processing and use image processing functions, the geographic information matrix is ​​stored in XML structure and stored as a geographic information file with the same name as the image in .xml.gz format. The storage structure of the dual-channel geographic information matrix is ​​as follows: figure 1 As shown, the .xml.gz file is the compressed format of the .xml file, and its xml file structure is as follows:

[0107]

[0108]2. In order to improve the calculation speed of the algorithm, all processor cores can be used for splicing, and the system automatically divides the spliced ​​images into batches, and...

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Abstract

The invention brings forward an aerial photography image and geographical data splicing method based on ORB feature matching. The method comprises the following steps: step 1, reading images to be spliced and geographical information; step 2, distributing tasks to processors; step 3, extracting ORB features of the images to be spliced; step 4, performing initialization estimation on parameters of a camera shooting the images to be spliced and solving a rotation matrix; step 5, improving estimation precision by use of bundle adjustment; step 6, performing initial splicing on the images to be spliced; step 7, performing brightness increment compensation on the images after the splicing, and based on multiband fusion of an image pyramid, performing conditional interpolation fusion on the geographical information after the splicing to obtain splicing result images; and step 8, and performing primary integrated splicing fusion on the splicing result images processed through all threads of each processor, and performing merging to obtain a final result image.

Description

technical field [0001] The invention belongs to image and geographic information fusion processing technology, which utilizes the fusion of image splicing technology and geographic data, and particularly relates to an ORB (Oriented FAST and Rotated BRIEF, oriented accelerated segmentation test feature and rotated binary robust independent Basic features) feature matching aerial imagery and geographic data mosaic method. Background technique [0002] Image mosaic technology is a complex of image registration and image fusion. It uses image registration and fusion technology comprehensively. Its purpose is to stitch and fuse multiple images with certain overlapping areas into one image. , seabed detection, satellite remote sensing images and other aspects have a wide range of applications. Among them, image registration mainly includes frequency-domain-based methods, region-based methods and feature-based image registration methods. [0003] The general image stitching techn...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T3/40G06T5/50G06T7/00G06K9/46
CPCG06T3/4038G06T5/50G06T2207/20221G06T2207/10032G06V10/462
Inventor 梁中岩郭乔进许建程晓光周鹏飞刘婧婷祁骏胡杰陈文明孟剑萍
Owner THE 28TH RES INST OF CHINA ELECTRONICS TECH GROUP CORP
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