Method and device for multispectral image registration

Abstract

The invention provides a method for multispectral image registration and a device for the multispectral image registration. The method comprises determining characteristic points in a reference image A and a to-be-registered multispectral image B, calculating a main direction of the reference image A and a main direction of the to-be-registered multispectral image B, enabling the reference image A to rotate in the main direction of the reference image A, enabling the to-be-registered multispectral image B to rotate in the main direction of the to-be-registered multispectral image B, extracting characteristic points after rotation, performing filtering on the characteristic points after the rotation, calculating an edge region EOH descriptor of each characteristic point, matching the characteristic point, which has the minimum Euclidean distance of the EOH descriptor from a to-be-matched characteristic point in the to-be-registered multispectral image B, in the reference image A with the to-be-matched characteristic point, and performing registration on the reference image A and the to-be-registered multispectral image B according to the matched characteristic points in the reference image A and the to-be-registered multispectral image B. The method for the multispectral image registration and the device for the multispectral image registration which are provided in the invention improve a registration effect of a multispectral image in the rotation condition, and improve registration precision of the multispectral image.

Description

technical field [0001] The invention relates to image processing technology, in particular to a multi-spectral image registration method and device. Background technique [0002] Image registration is the process of matching two or more images of the same scene from different times, different sensors, different illuminance or different viewing angles, to achieve correct stitching between offset and rotated images. Multispectral image registration refers to the combination of multiple image information of the same scene obtained from the multispectral detector, using the temporal and spatial correlation of multiple images and the complementarity of information to obtain a comprehensive and comprehensive view of the scene. Clear description. However, the spectral information between multiple bands is added to the multispectral image. Due to different image detectors, the properties of the generated images are different. For example, there is no corresponding relationship betw...

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Problems solved by technology

[0004] However, since the current descriptor is mainly used to describe the position and scale of the feature points of the image, when the multispectral image has rotation, the main direction of the feature points in the descriptor cannot be corresponding, and the robustness to the rotation transformation is poor, making The accuracy of multispectral image registration is low

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