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Fast matching method and system for remote sensing images

A remote sensing image and matching method technology, applied in image enhancement, image analysis, image data processing and other directions, can solve the problem of image matching matching accuracy and matching efficiency being difficult to meet at the same time, and achieve the effect of shortening the process and improving the accuracy.

Inactive Publication Date: 2016-02-24
WUHAN INSTITUTE OF TECHNOLOGY
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a fast remote sensing image matching method and system with high matching accuracy for the defect that the matching accuracy and matching efficiency of image matching in the prior art are difficult to satisfy at the same time

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[0042] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0043] Such as figure 1 As shown, the fast remote sensing image matching method of the embodiment of the present invention includes the following steps:

[0044] S1. Acquire the reference image and the image to be matched and perform rough matching on them, respectively construct integral histograms for the two images, and determine the candidate matching area according to the similarity between the image to be matched and the integral histogram of the reference image;

[0045]S11. Perform histogram equalization on the reference image and the image to be matched, and calculate the integral histogr...

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Abstract

The present invention discloses a fast matching method and system for remote sensing images. The method comprises the following steps of: S1, acquiring a reference image and a to-be-matched image, roughly matching the two images, constructing integral histograms for the two images separately, and determining a candidate matching region according to the similarity of the integral histograms of the to-be-matched image and the reference image; and S2, finely matching the to-be-matched image with the candidate matching region, which comprises the specific steps of: S21, extracting features in the the to-be-matched image and the candidate matching region, and constructing a feature point matching set; S22, constructing formalized expression of a probability expression model and feature point mapping according to the feature point matching set; and S23, eliminating a mismatch according to an expectation-maximization algorithm, calculating a precise matching model, and obtaining a precise matching region of the image by using the precise matching model. According to the fast matching method and system for the remote sensing images, the time of an image processing process is greatly shortened, and the matching precision and the algorithm robustness are improved.

Description

technical field [0001] The invention relates to the field of digital image processing, in particular to a fast remote sensing image matching method and system. Background technique [0002] Image matching is a basic and challenging technology in the field of remote sensing. It is a key prerequisite for remote sensing applications including environmental monitoring, image fusion, image registration, map update, and scene-assisted navigation. It is the foundation of aerospace photogrammetry and remote sensing image processing. The core problem is a key step in obtaining location information from images automatically and with high reliability. Its main goal is to find overlapping regions of the same scene in two images. Due to the high pixel level of remote sensing images, their optical and geometric distortions are particularly large, making it very difficult to efficiently obtain high-precision matching results. Especially for images from different sources, most methods are ...

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Application Information

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IPC IPC(8): G06T7/00G06T5/40
CPCG06T5/40G06T2207/10032
Inventor 周华兵马佳义张彦铎李晓林鲁统伟闵锋卢涛余宝成李迅朱锐陈灯任世强朱国家
Owner WUHAN INSTITUTE OF TECHNOLOGY
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