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An image registration method based on BRISK algorithm

An image registration and algorithm technology, applied in image analysis, image data processing, calculation, etc., to achieve fast speed, high image registration rate, and time-saving effects

Inactive Publication Date: 2019-03-08
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the need for accurate matching of existing image registration, and the problem of fast computing performance; the purpose of the present invention is to provide a method for image registration based on the BRISK algorithm

Method used

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Experimental program
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Embodiment Construction

[0021] This embodiment adopts the following technical solutions: its registration method is as follows:

[0022] Step 1: Extraction of BRISK features:

[0023] 1.1. Scale space key point extraction: extend FAST focus detection from image plane to scale space, and use FAST score to search for maximum value in image plane and scale space at the same time; the scale space pyramid of BRISK contains n surface layers c i and n inner layers d i , where n is a setting parameter, i={0,1,…,n-1}; for the original image c 0 Continuous half-sampling to get all surface layers, inner layer d 0 By modifying the original image c 0 It is obtained by downsampling by 1.5 times, and the other inner layers are obtained by continuous half-sampling d0; therefore, a 2 n layer pyramid;

[0024] 1.2. Extraction of BRISK key points: Use a string of binary numbers to identify, select a center point around the key point, and use the center point to make a circular component;

[0025] Step 2: Perform ...

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Abstract

The invention discloses an image registration method based on BRISK algorithm, which relates to the technical field of image registration. The registration method comprises the steps of 1 extracting the BRISK feature; 2 carrying out gray comparison through that BRISK algorithm, carrying out gray comparison on an image, selecting a sampling mode during the comparison, carrying out primary matchingon the image, and marking the primary matching image; 3 matching and transforming algorithm. The method of the invention can realize the improvement of the speed, the processing speed is fast, the time can be saved, and the overall efficiency can be improved. The method realize the accuracy reaching 99.9%, and can be quickly matched and transformed, which makes the image registration rate high.

Description

technical field [0001] The invention belongs to the technical field of image registration, and in particular relates to an image registration method based on a BRISK algorithm. Background technique [0002] As a basic method of image processing, image registration technology has been widely used in the fields of automatic drawing of aerial images, super-resolution image reconstruction, computer vision, pattern recognition and so on. To put it simply, image registration is a method of trying to establish the corresponding relationship between two images, determine the corresponding geometric transformation parameters, and perform geometric transformation on one of the two images. At present, image registration algorithms can be roughly divided into: [0003] (1) Domain-based approach. Using related technologies, the calculation method is simple and the hardware is easy to implement, but it requires operations on all pixels of the entire image, which brings a series of probl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/33
CPCG06T7/33
Inventor 袁丽英刘佳
Owner HARBIN UNIV OF SCI & TECH