基于多特征融合词包模型的SAR目标鉴别算法

宋文青; 王英华; 时荔蕙; 刘宏伟; 保铮

doi:10.11999/JEIT170086

基于多特征融合词包模型的SAR目标鉴别算法

doi: 10.11999/JEIT170086

基金项目:

国家自然科学基金(61671354, 61701379)，国家杰出青年科学基金(61525105)，中央高校基本科研业务费专项资金，陕西省自然科学基础研究计划(2016JQ6048)

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出版历程
- 收稿日期: 2017-01-23
- 修回日期: 2017-08-25
- 刊出日期: 2017-11-19

SAR Target Discrimination Algorithm Based on Bag-of-words Model with Multi-feature Fusion

Funds:

The National Natural Science Foundation of China (61671354, 61701379), The National Science Fund for Distinguished Young Scholars of China (61525105), The Fundamental Research Funds for the Central Universities, The Natural Science Basic Research Plan in Shaanxi Province of China (2016JQ6048)

摘要

摘要: 针对复杂场景中的SAR目标鉴别问题，该文提出一种基于多特征融合词包(Bag-of-Words, BoW)模型的SAR目标鉴别算法。在BoW模型底层特征提取阶段，算法采用SAR-SIFT特征描述局部区域的形状信息；同时，采用该文基于传统鉴别特征提出的一组新的SAR图像局部特征描述局部区域的对比度信息和纹理信息。对于BoW模型中多个底层特征的融合，算法采用图像层的特征融合方式生成图像的全局鉴别特征，其中各单底层特征BoW模型特征的权系数通过L2范数约束的多核学习方法训练得到。在MiniSAR实测SAR图像数据上的目标鉴别实验表明，与基于传统鉴别特征以及单底层特征BoW模型特征的鉴别算法相比较，该文基于多特征融合BoW模型SAR目标鉴别算法具有更好的鉴别性能。
- SAR /
- 目标鉴别 /
- 词包模型 /
- 底层特征 /
- 多核学习
Abstract: In order to solve the SAR target discrimination problem in the real complex scenes, a SAR target discrimination method is proposed based on Bag-of-Words (BoW) model with multiple low-level features fusion. In the low-level feature extraction stage of BoW model, the SAR-SIFT feature is utilized to describe the shape information of local regions of an image sample. And also, a set of new local descriptors is used to capture the contrast information and the texture information of the local regions, which is extracted based on the traditional target discrimination features. For the fusion of different low-level features in BoW model, the image-level feature fusion strategy is implemented to generate the image global feature, which is realized by the Multiple Kernel Learning (MKL) method with L2-norm regularization. Experimental results with the MiniSAR real SAR dataset show that the proposed SAR target discrimination algorithm based on BoW model with multi-feature fusion achieves better discrimination performance compared with methods based on the traditional discrimination features and the BoW model features using single low-level descriptor.
- SAR /
- Target discrimination /
- Bag-of-Words (BoW) model /
- Low-level descriptor /
- Multiple Kernel Learning (MKL)

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参考文献(36)

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