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Novel image registering method

An image registration, a new type of technology, applied in the field of image processing, can solve the problems of large influence of human factors and difficult automation.

Active Publication Date: 2016-12-07
NANJING UNIV OF POSTS & TELECOMM
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  • Abstract
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Problems solved by technology

However, the process of image segmentation and feature extraction is difficult to automate and is greatly affected by human factors.

Method used

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Embodiment Construction

[0064] The technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings and embodiments, and the embodiments use two sets of test images to illustrate the present invention. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0065] The main purpose of the present invention is to apply a differential evolution algorithm based on an alternative strategy to the maximum mutual pheromone method based on gray information in the field of image registration, so as to improve the registration accuracy and speed of image registration.

[0066] To achieve the above purpose, the present invention proposes a novel image registration method. figure 1 A flowchart showing the method for maximum mutual pheromone image registration based on grayscale values. Such as figure 1 As shown, the method includ...

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Abstract

The invention brings forward a novel image registering method. The method comprises the following steps: establishing gray-scale-based mutual information registering adaptation value function; establishing and initializing a group, wherein four dimensions of each individual in the group respectively represents horizontal translation, vertical translation, a rotation angle and a zoom coefficient of a floating image; according to the mutual information registering adaptation value function, calculating a fitness value of each individual, and calculating an optimal position of the whole group; by use of an iteration mechanism of a differential evolution algorithm, updating a position vector of each individual, and updating the optimal position of the whole group; determining whether conditions for executing an alternative strategy is satisfied, and if so, executing the corresponding alternative strategy; and repeatedly executing the aforementioned steps until maximum iteration frequency Tmax of the differential evolution algorithm is satisfied. The novel image registering method has the advantages of good registering stability and high precision, greatly improves the performance of an image registering algorithm and lays a reliable foundation for subsequent image processing work.

Description

technical field [0001] The invention relates to the field of image processing, in particular to an image registration method. Background technique [0002] Mutual information measures how independent two images are from each other. As an image registration method based on maximum mutual information, its basic principle is: when two images containing the same or similar content undergo spatial transformation (rotation, translation, scaling, etc.) information max. Commonly used features include: using mutual information as the similarity side degree, which can not only speed up the registration speed, but also improve the registration accuracy. [0003] Image registration is one of the important steps in image processing. It is a process of matching two images acquired at different times, different angles, different shooting conditions, or different sensor conditions. The key to image registration is to find the functional mapping between the floating image and the referen...

Claims

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Application Information

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IPC IPC(8): G06T3/00
Inventor 高浩师玉娇王保云周航
Owner NANJING UNIV OF POSTS & TELECOMM
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