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Abstract

Some embodiments of the present disclosure provide an image preprocessing method and an image preprocessing device for image registration. The method includes: selecting a Gaussian filtering window size and a Gaussian filtering smoothness parameter for constructing a Gaussian filtering function; calculating first order partial derivatives of the Gaussian filtering function in different directions respectively; performing convolution operation on the first order partial derivatives in different directions with original images in corresponding directions and images to be registered in corresponding directions respectively, and obtaining filtered original images and filtered images to be registered in corresponding directions; and performing image registration on the filtered original images and the filtered images to be registered. denoising by filtering during image registration is implemented, and the image registration precision is improved.

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First Claim