Rock slice image alignment method combining single polarized light and orthogonal polarized light images

Abstract

The invention discloses a rock slice image alignment method combining single polarized light and orthogonal polarized light images. The method comprises the following steps: S1, preprocessing a single polarized light image and an orthogonal polarized light image of a rock slice; s2, extracting feature points in the preprocessed image, and performing rough matching on the extracted feature points; s3, based on the rough matching result of the feature points, obtaining a homography matrix for pixel mapping by utilizing a bidirectional cross matching method, and taking the homography matrix as an accurate matching result; and S4, mapping all pixels of the orthogonal polarized image into the single polarized image based on an accurate matching result to achieve rock slice image alignment. According to the orthogonal polarized image and the single polarized image which are aligned through the method, a serious distortion phenomenon does not occur in a subsequent fusion process, and a relatively good image alignment effect is achieved; according to the method, the calculation time of image alignment can be reduced, the real-time performance is achieved, the influence of noise on feature extraction can be inhibited, and the method has stability when feature points are extracted.

Description

technical field [0001] The invention belongs to the technical field of image processing, and in particular relates to a rock thin section image alignment method combining single polarized light and crossed polarized light images. Background technique [0002] The particle size analysis of rock thin section images is generally obtained by using a single polarized light transmission under a microscope, and then the particle size analysis is performed on the image. The color distinction degree, and the rock thin section image under the orthogonal polarized light can obtain the clear outline boundary of the rock grains. Therefore, by combining the advantages of the single polarized light image and the crossed polarized light image and complementing the advantages of the two, a higher quality image can be obtained. So as to achieve a good particle segmentation effect. [0003] In the process of acquiring the orthogonal polarization image and the single polarization image, the tw...

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Problems solved by technology

[0006] Aiming at the above-mentioned deficiencies in the prior art, the rock thin section image alignment method combining single polarized light and crossed polarized light provided by the present invention solves the problem of image alignment under different polarized light

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