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Triangle-area-representation-histogram-based image registration method

An image registration and histogram technology, applied in image analysis, image data processing, instruments, etc., can solve the problems of low accuracy rate and low accuracy rate, and achieve the effect of improving stability

Inactive Publication Date: 2013-01-09
SHANGHAI INST OF TECH
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Problems solved by technology

[0003] The present invention aims at the problem of low correct rate of image matching and calibration, and proposes an image registration method based on the histogram of triangle area representation, using the geometric invariance under affine transformation --- triangle area representation (TAR: triangle -area representation) histogram statistics, effectively overcome the defects of extremely low correct rate when using feature point matching algorithm for remote sensing image registration

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  • Triangle-area-representation-histogram-based image registration method

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[0024] The defect of the matching relationship between the feature points calculated by using the feature descriptor is mainly caused by the multi-modality of the image. The image registration method based on the triangle area representation histogram uses the geometric invariance information that is stable to the multimodality of the image, that is, the geometric invariance under the affine transformation---the histogram statistics information represented by the triangle area. The specific steps of the method are as follows:

[0025] 1) Input two images to be registered: the reference image (R, Reference Image) such as figure 1 As shown in (a), the floating image (S, Sensed Image) is as figure 1 as shown in (b);

[0026] 2) From the two remote sensing images to be registered, use the feature point detection algorithm to detect the feature point set from the reference image (R, Reference Image) respectively ,Such as figure 2 As shown in (a), the feature point set is dete...

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Abstract

The invention relates to a triangle-area-representation (TRA)-histogram-based image registration method. In the method, by using geometrical invariability under affine transformation, namely triangle-area-representation histogram statistic information, a correct matching feature point pair is effectively found from a feature matching point pair sequence with an extremely low correct rate, so the stability of a feature point matching algorithm used under the condition is greatly improved and a new way for the registration of remote sensing images is provided.

Description

technical field [0001] The invention relates to a graphics processing technology, in particular to an image registration method based on a triangle area representation histogram. Background technique [0002] The feature point detection and matching algorithm is an algorithm used to detect feature points from two images to be registered and perform matching operations. However, due to the shortcomings of this algorithm, which is sensitive to geometric deformation and image gray level changes, it is very unstable when it is used for remote sensing image registration, and the correct matching rate between feature points is extremely low. Contents of the invention [0003] The present invention aims at the problem of low correct rate of image matching and calibration, and proposes an image registration method based on the histogram of triangle area representation, using the geometric invariance under affine transformation --- triangle area representation (TAR: triangle -area...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06K9/64G06T7/00G06T7/33
Inventor 宋智礼
Owner SHANGHAI INST OF TECH