CN105184322B - A kind of multidate image sorting technique based on incremental integration study - Google Patents

A kind of multidate image sorting technique based on incremental integration study Download PDF

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CN105184322B
CN105184322B CN201510582557.5A CN201510582557A CN105184322B CN 105184322 B CN105184322 B CN 105184322B CN 201510582557 A CN201510582557 A CN 201510582557A CN 105184322 B CN105184322 B CN 105184322B
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CN105184322A (en
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谷延锋
刘欢
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Harbin Institute of Technology
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    • G06F18/2411Classification techniques relating to the classification model, e.g. parametric or non-parametric approaches based on the proximity to a decision surface, e.g. support vector machines

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Abstract

A kind of multidate image sorting technique based on incremental integration study, is related to Multitemporal Remote Sensing Images sorting technique field.The present invention is to solve the problems, such as that multidate image nicety of grading is low.The present invention introduces incremental learning on the basis of integrated study, constructs multidate grader, realizes continuously on-line study.First, then the image data of each phase obtains strong classifier C respectively as the basic kernel function of support vector machines algorithm by Ensemble Learning Algorithms0;Secondly, new training data is introduced, original training dataset is updated, obtains incremental data set, then strong classifier C is obtained by Ensemble Learning Algorithms1;New training data is introduced successively, and strong classifier C is obtained by Ensemble Learning Algorithmsn;Last each strong classifier is added to obtain final classification device, is used for the classification of test sample.The present invention classifies suitable for multidate image.

Description

A kind of multidate image sorting technique based on incremental integration study
Technical field
The present invention relates to Multitemporal Remote Sensing Images sorting technique fields.
Background technology
As the speed of remote sensing science and technology gathered data is continuously increased, the temporal resolution of remotely-sensed data also constantly carries Height, research contents have been progressed into the period of multidate image by Mono temporal image period.Multidate image can be reflected in one Determine each target in region has the characteristics that data volume is big, dimension is high and state is constantly updated in the state change of different moments. By the research to multi-temporal remote sensing image, land cover pattern situation of change etc. can be monitored, resource, ring to realization to the earth Border etc. is monitored.Therefore research multidate image sorting technique, has great importance.
Current method can not efficiently solve the problem of sample diversity and complex boundary in multidate image so that The nicety of grading of multi-temporal remote sensing image is relatively low.
Invention content
The present invention is provided a kind of based on incremental integration study to solve the problems, such as that multidate image nicety of grading is low Multidate image sorting technique.
A kind of multidate image sorting technique based on incremental integration study, it is realized by following steps:
Step 1: reading multidate image data, handmarking is carried out to it, monitoring data is obtained, according to monitoring data It determines marker samples, is randomly choosed to obtain training sample and increment sample set by the sample in marking, remaining is as test sample;
Step 2: integrating strong classifier C by Ensemble Learning Algorithms0, the iterations that incremental learning is arranged are N, N For positive integer;
Step 3: stochastical sampling obtains increment sample in increment sample set, i.e. newly-increased training sample, using newly-increased Sample replaces the sample of the distribution of weights minimum in Ensemble Learning Algorithms, updates the weight of training sample and makes it to be uniformly distributed;
Step 4: update training dataset, and determine strong classifier C by Ensemble Learning Algorithmsn, n=1,2 ..., N;
Step 5: step 3 is repeated to step 4, until reaching the iterations N of incremental learning, by each strong classifier CnIt is added, constitutes final classification device;
Step 6: classifying to the test sample of step 1 using final classification device, and survey is provided using voting mechanism The classification results of sample sheet.
Described in step 2 and step 4 by Ensemble Learning Algorithms integrate strong classifier be utilize Adaboost collection It is realized at algorithm, and the Weak Classifier in the Adaboost Integrated Algorithms is support vector machines algorithm.
The specific method of strong classifier is obtained using Adaboost Integrated Algorithms is:
It is opposite when then each using the training data under each phase as the kernel function in support vector machines Weak Classifier of the support vector machines for the Kernel answered as Adaboost algorithm;According to Adaboost algorithm to instruction Practice data and be iterated formula training, if iterations are T;T is positive integer;
First, the distribution of weights of training sample is set as being uniformly distributed;
Then, all training samples are sampled according to sample rate, the sample after being sampled, to the sample after sampling Originally it is trained to obtain Weak Classifier 1;
Finally tested with all training samples;
For then improving corresponding weight by the sample of mistake point in test, the sample correctly classified then reduces its weight, right Training sample after adjustment weight is still sampled according to corresponding sample rate, is trained to obtain weak point to the sample after sampling Class device 2;And so on, iteration T times.
In the present invention, incremental learning instructs the sample of continuous renewal on the basis of retaining original training pattern Practice study, forms a continuous learning system, improve the learning ability of system.The present invention passes through to new sample It practises, solves the problems, such as to be learnt in face of diversity sample, while the sample of complex boundary can be learnt, overcome The classification problems such as sample diversity and complex boundary present in multidate image, can effectively improve the precision of classification.
Description of the drawings
Fig. 1 is a kind of flow signal of multidate image sorting technique learnt based on incremental integration of the present invention Figure.
Specific implementation mode
Specific implementation mode one, a kind of multidate image sorting technique based on incremental integration study, it is by following steps It realizes:
Step 1: reading multidate image data, handmarking is carried out to it, monitoring data is obtained, according to monitoring data It determines marker samples, is randomly choosed to obtain training sample and increment sample set by the sample in marking, remaining is as test sample;
Step 2: integrating strong classifier C by Ensemble Learning Algorithms0, the iterations that incremental learning is arranged are N;
Step 3: stochastical sampling obtains increment sample in increment sample set, i.e. newly-increased training sample, using newly-increased Sample replaces the sample of the distribution of weights minimum in Ensemble Learning Algorithms, updates the weight of training sample and makes it to be uniformly distributed;
Step 4: update training dataset, and determine strong classifier C by Ensemble Learning Algorithmsn, n=1,2 ..., N;
Step 5: step 3 is repeated to step 4, until reaching the iterations of incremental learning, by each strong classifier Cn It is added, constitutes final classification device;
Step 6: classifying to the test sample of step 1 using final classification device, and survey is provided using voting mechanism The classification results of sample sheet.
Specific implementation mode two, present embodiment are that one kind described in specific implementation mode one is based on incremental integration The multidate image sorting technique of habit further limits, being integrated by Ensemble Learning Algorithms described in step 2 and step 4 To strong classifier be using Adaboost Integrated Algorithms realize, and the Weak Classifier in the Adaboost Integrated Algorithms be support to Amount machine SVM algorithm.
Specific implementation mode three, present embodiment are that one kind described in specific implementation mode two is based on incremental integration The multidate image sorting technique of habit further limits, and the specific method of strong classifier is obtained using Adaboost Integrated Algorithms It is:
It is opposite when then each using the training data under each phase as the kernel function in support vector machines Weak Classifier of the support vector machines for the Kernel answered as Adaboost algorithm;According to Adaboost algorithm to instruction Practice data and be iterated formula training, if iterations are T;T is positive integer;
First, the distribution of weights of training sample is set as being uniformly distributed;
Then, all training samples are sampled according to sample rate according to weight distribution, the sample after being sampled, Sample after sampling is trained to obtain Weak Classifier 1;
Finally tested with all training samples;
For then improving corresponding weight by the sample of mistake point in test, the sample correctly classified then reduces its weight, right Training sample after adjustment weight is still sampled according to corresponding sample rate, is trained to obtain weak point to the sample after sampling Class device 2;And so on, iteration T times.

Claims (3)

1. a kind of multidate image sorting technique based on incremental integration study, it is characterized in that:It is realized by following steps:
Step 1: reading multidate image data, handmarking is carried out to it, is obtained monitoring data, is determined according to monitoring data Marker samples are randomly choosed to obtain training sample and increment sample set by the sample in marking, remaining is as test sample;
Step 2: integrating strong classifier C by Ensemble Learning Algorithms0, the iterations that incremental learning is arranged are N, and N is just Integer;
Step 3: stochastical sampling obtains increment sample, i.e. newly-increased training sample in increment sample set, newly-increased sample is utilized Instead of the sample of the distribution of weights minimum in Ensemble Learning Algorithms, updating the weight of training sample makes it to be uniformly distributed;
Step 4: update training dataset, and determine strong classifier C by Ensemble Learning Algorithmsn, n=1,2 ..., N;
Step 5: step 3 is repeated to step 4, until reaching the iterations N of incremental learning, by each strong classifier CnPhase Add, constitutes final classification device;
Step 6: classifying to the test sample of step 1 using final classification device, and test specimens are provided using voting mechanism This classification results.
2. a kind of multidate image sorting technique based on incremental integration study according to claim 1, it is characterised in that Described in step 2 and step 4 to integrate strong classifier by Ensemble Learning Algorithms be real using Adaboost Integrated Algorithms It is existing, and the Weak Classifier in the Adaboost Integrated Algorithms is support vector machines algorithm.
3. a kind of multidate image sorting technique based on incremental integration study according to claim 2, it is characterised in that The specific method of strong classifier is obtained using Adaboost Integrated Algorithms is:
It is corresponding when then each using the training data under each phase as the kernel function in support vector machines Weak Classifier of the support vector machines of Kernel as Adaboost algorithm;According to Adaboost algorithm to training number According to formula training is iterated, if iterations are T;T is positive integer;
First, the distribution of weights of training sample is set as being uniformly distributed;
Then, all training samples are sampled according to sample rate, the sample after being sampled, to the sample after sampling into Row training obtains Weak Classifier 1;
Finally tested with all training samples;
For then improving corresponding weight by the sample of mistake point in test, the sample correctly classified then reduces its weight, to adjustment Training sample after weight is still sampled according to corresponding sample rate, is trained to obtain Weak Classifier to the sample after sampling 2;And so on, iteration T times.
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CN107563441A (en) * 2017-09-01 2018-01-09 深圳市唯特视科技有限公司 A kind of urban target detection method based on grader
CN108830312B (en) * 2018-06-01 2022-09-09 苏州中科天启遥感科技有限公司 Integrated learning method based on sample adaptive expansion
CN111488917A (en) * 2020-03-19 2020-08-04 天津大学 Garbage image fine-grained classification method based on incremental learning

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