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Coevolutionary algorithm optimized support vector machine wetland remote sensing remote sensing classification method

A support vector machine and co-evolution technology, applied in the field of support vector machine wetland remote sensing classification, can solve the problems that support vector machine and co-evolution algorithm have not yet appeared, achieve good execution efficiency and classification performance, improve evolution speed, and low population diversity sexual effect

Active Publication Date: 2017-08-18
HARBIN NORMAL UNIVERSITY
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Problems solved by technology

Zang Shuying, Zhang Ce, Zhang Lijuan, Zhang Yuhong. Genetic Algorithm-optimized Support Vector Machine for Wetland Remote Sensing Classification. Geographical Science [J] 2012, 32(4): 434-441 Proposed Genetic Algorithm-optimized Support Vector Machine for Remote Sensing Classification. The combination of support vector machine and co-evolutionary algorithm has not yet appeared in remote sensing classification research

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  • Coevolutionary algorithm optimized support vector machine wetland remote sensing remote sensing classification method

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specific Embodiment approach 1

[0043] 1. Basic principle and performance analysis

[0044] 1.1 Support Vector Machine Classification Principle

[0045] The mechanism of support vector machine (SVM) is to find an optimal classification hyperplane that meets the classification requirements, so that the hyperplane can maximize the blank area on both sides of the hyperplane while ensuring the classification accuracy; For example, given a training sample set (x i ,y i ), i=1,...,l; x∈R n , y∈{+1,-1}, the hyperplane is denoted as (w x)+b=0, in order to make the classification face all samples correctly classified and have a classification interval, it is required to meet the following constraints:

[0046] the y i [(w·x i )+b]≥1 i=1, 2, ..., l (1)

[0047] In the above formula (1), w represents the normal vector of the hyperplane, and b represents the bias;

[0048] It can be calculated that the classification interval is 2 / ||w||, so the problem of constructing the optimal hyperplane is transformed into find...

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Abstract

Provided is a coevolutionary algorithm optimized support vector machine wetland remote sensing remote sensing classification method, belonging to the technical field of remote sensing. The method includes the following steps of 1. adopting an individual coding manner; 2. calculating the individual fitness function; and 3. performing PSO-GA coevolutionary algorithm: (1) initializing the population and parameters; (2) adopting a PSO evolution strategy; (3) adopting a GA evolution strategy; (4) selecting the filial generation; and (5) updating the selection probability of the strategies. The PSO-GA coevolutionary algorithm is adopted to carry out the optimization selection of the SVM model parameters, the algorithm combines the PSO and GA and takes the optimization parameters and the high-precision classification as the design scheme to perform the probability selection of the evolution strategies, and through the combination of the two evolution calculating modes, the global searching capability is guaranteed to prevent from local optimization and the evolution speed is improved.

Description

technical field [0001] The invention belongs to the technical field of remote sensing, and in particular relates to a support vector machine wetland remote sensing classification method optimized by a cooperative evolution algorithm. Background technique [0002] Support Vector Machine (SVM) is a new type of machine learning method based on statistical learning theory. This method is based on the principle of VC dimension and structural risk minimization in statistical learning theory, and converts linear inseparable problems into linearly separable problems with the help of kernel functions. problem, so that the problem is finally transformed into solving a convex quadratic programming problem, which overcomes the "curse of dimensionality" and "over-learning", and has outstanding advantages in small sample, nonlinear and high-dimensional pattern recognition, and has been obtained in many application fields It has a good effect and has become a research hotspot in the field ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/62G06K9/00
CPCG06V20/13G06F18/2411G06F18/214
Inventor 于晓冬夏天
Owner HARBIN NORMAL UNIVERSITY
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