Joint Posterior Probability Active Learning for Hyperspectral Image Classification

Active learning (AL) is an approach that can reduce the dependence on the labeled set significantly. However, most current active-learning methods are only concerned with the first two columns of the posterior probability matrix during the sampling phase. When the difference between the first and se...

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Bibliographic Details
Published in:Remote sensing (Basel, Switzerland) Switzerland), 2023-08, Vol.15 (16), p.3936
Main Authors: Li, Shuying, Wang, Shaowei, Li, Qiang
Format: Article
Language:English
Subjects:
Accuracy
active learning
Algorithms
Analysis
Classification
Conditional probability
conditional random field
Conditional random fields
Data mining
hyperspectral image
Hyperspectral imaging
Image classification
Labeling
Machine learning
Probability
Probability distribution
Probability learning
Sampling
Spatial data
Statistical analysis
Support vector machines
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Summary:Active learning (AL) is an approach that can reduce the dependence on the labeled set significantly. However, most current active-learning methods are only concerned with the first two columns of the posterior probability matrix during the sampling phase. When the difference between the first and second-largest posterior probabilities of several samples is proximate, these approaches fail to distinguish them further. To improve these deficiencies, we propose an active-learning algorithm, joint posterior probabilistic active learning combined with conditional random field (JPPAL_CRF). In the active-learning sampling phase, a new sampling decision function is built by jointing all the information in the posterior probability matrix. By doing so, the variability between different samples is refined, which makes the selected samples more meaningful for classification. Then, a conditional random field (CRF) approach is applied to mine the regional spatial information of the hyperspectral image and optimize the classification results. Experiments on two common hyperspectral datasets validate the effectiveness of JPPAL_CRF.
ISSN:2072-4292
2072-4292
DOI:10.3390/rs15163936