Method and system for image registration

An image registration and image technology, applied in the field of image processing, can solve problems such as difficulty in obtaining key points, inapplicability to marine SAR images, noise sensitivity, etc.
CN103489178AInactive Publication Date: 2014-01-01INST OF ELECTRONICS CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
INST OF ELECTRONICS CHINESE ACAD OF SCI
Publication Date
2014-01-01
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a method and system for image registration. Blocking is performed on images collected by multiple channels, and step-by-step downsampling is respectively performed on all image blocks; step-by-step recursion matching is performed on all image block sets obtained through the downsampling according to resolution ratios from low to high, and optimal matching positions of the original image blocks are obtained; according to the optimal matching positions of all the image blocks, corresponding relations of the main images and the auxiliary images are obtained, and the auxiliary images are moved to achieve the image registration. The amount of operations of the step-by-step recursion structure is small, and therefore the stable and efficient registration can also be performed on ocean SAR images which are not large in size and not obvious in local texture.
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Description

Technical field

[0001] The present invention relates to image processing technology, in particular to an image registration method and system. Background technique

[0002] Synthetic Aperture Radar (SAR, Synthetic Aperture Radar), also known as microwave imaging radar, is one of many radars. It uses complex radar data post-processing methods to obtain extremely narrow effective radiation beams, which is extremely important for the generated radar images. High resolution. It is characterized by high resolution, can work around the clock, and can effectively identify camouflage and penetrating masks, such as identifying camouflaged missile silos and ground targets in areas covered by clouds and fog.

[0003] Image registration refers to the process of matching two or more images of the same scene taken from different times, different sensors, or different perspectives. A single image has limitations in time and spatial resolution, and image registration can provide scene interpreta...

Claims

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