Target detection is always an important application in hyperspectral image processing field. In this paper, a spectral-spatial target detection algorithm for hyperspectral data is proposed.The spatial feature and spec...Target detection is always an important application in hyperspectral image processing field. In this paper, a spectral-spatial target detection algorithm for hyperspectral data is proposed.The spatial feature and spectral feature were unified based on the data filed theory and extracted by weighted manifold embedding. The novelties of the proposed method lie in two aspects. One is the way in which the spatial features and spectral features were fused as a new feature based on the data field theory, and the other is that local information was introduced to describe the decision boundary and explore the discriminative features for target detection. The extracted features based on data field modeling and manifold embedding techniques were considered for a target detection task.Three standard hyperspectral datasets were considered in the analysis. The effectiveness of the proposed target detection algorithm based on data field theory was proved by the higher detection rates with lower False Alarm Rates(FARs) with respect to those achieved by conventional hyperspectral target detectors.展开更多
In the field of hyperspectral image(HSI)classification in remote sensing,the combination of spectral and spatial features has gained considerable attention.In addition,the multiscale feature extraction approach is ver...In the field of hyperspectral image(HSI)classification in remote sensing,the combination of spectral and spatial features has gained considerable attention.In addition,the multiscale feature extraction approach is very effective at improving the classification accuracy for HSIs,capable of capturing a large amount of intrinsic information.However,some existing methods for extracting spectral and spatial features can only generate low-level features and consider limited scales,leading to low classification results,and dense-connection based methods enhance the feature propagation at the cost of high model complexity.This paper presents a two-branch multiscale spectral-spatial feature extraction network(TBMSSN)for HSI classification.We design the mul-tiscale spectral feature extraction(MSEFE)and multiscale spatial feature extraction(MSAFE)modules to improve the feature representation,and a spatial attention mechanism is applied in the MSAFE module to reduce redundant information and enhance the representation of spatial fea-tures at multiscale.Then we densely connect series of MSEFE or MSAFE modules respectively in a two-branch framework to balance efficiency and effectiveness,alleviate the vanishing-gradient problem and strengthen the feature propagation.To evaluate the effectiveness of the proposed method,the experimental results were carried out on bench mark HsI datasets,demonstrating that TBMSSN obtained higher classification accuracy compared with several state-of-the-art methods.展开更多
建立能兼顾多元素地球化学空谱特征、有效拟合数据复杂分布的检测模型,是识别异常区域的关键.针对新疆东昆仑高海拔深切割浅覆盖地区地球化学找矿异常提取难题,本研究提出一种空谱特征-空间关联双分支模型(Spatial-Spectral Feature and...建立能兼顾多元素地球化学空谱特征、有效拟合数据复杂分布的检测模型,是识别异常区域的关键.针对新疆东昆仑高海拔深切割浅覆盖地区地球化学找矿异常提取难题,本研究提出一种空谱特征-空间关联双分支模型(Spatial-Spectral Feature and Global Spatial Correlation Network,SSGSNet),空谱特征分支基于ResNet残差块,融入双重注意力模块提取局部空谱特征;空间关联分支通过patch嵌入和自注意力机制挖掘全局空间关联特征.融入构造数据提高了地球化学综合异常找矿的准度,SHAP值也解释了模型中断裂的关键作用.实验结果表明,SSGSNet模型的AUC值达0.945 3,显著优于ResNet、ViT单模型和普通的空谱双分支模型.野外查证显示,遥西、巴什干克等4处高异常区均发现不同程度金矿化现象,证实该模型可有效解决复杂背景下地球化学异常信息提取难题,为覆盖区矿产勘探提供了可靠的技术支撑与靶区指导.展开更多
摘要Target detection is always an important application in hyperspectral image processing field. In this paper, a spectral-spatial target detection algorithm for hyperspectral data is proposed.The spatial feature and spectral feature were unified based on the data filed theory and extracted by weighted manifold embedding. The novelties of the proposed method lie in two aspects. One is the way in which the spatial features and spectral features were fused as a new feature based on the data field theory, and the other is that local information was introduced to describe the decision boundary and explore the discriminative features for target detection. The extracted features based on data field modeling and manifold embedding techniques were considered for a target detection task.Three standard hyperspectral datasets were considered in the analysis. The effectiveness of the proposed target detection algorithm based on data field theory was proved by the higher detection rates with lower False Alarm Rates(FARs) with respect to those achieved by conventional hyperspectral target detectors.
基金supported by the National Natural Science Foundation of China(62077038,61672405,62176196 and 62271374)。
摘要In the field of hyperspectral image(HSI)classification in remote sensing,the combination of spectral and spatial features has gained considerable attention.In addition,the multiscale feature extraction approach is very effective at improving the classification accuracy for HSIs,capable of capturing a large amount of intrinsic information.However,some existing methods for extracting spectral and spatial features can only generate low-level features and consider limited scales,leading to low classification results,and dense-connection based methods enhance the feature propagation at the cost of high model complexity.This paper presents a two-branch multiscale spectral-spatial feature extraction network(TBMSSN)for HSI classification.We design the mul-tiscale spectral feature extraction(MSEFE)and multiscale spatial feature extraction(MSAFE)modules to improve the feature representation,and a spatial attention mechanism is applied in the MSAFE module to reduce redundant information and enhance the representation of spatial fea-tures at multiscale.Then we densely connect series of MSEFE or MSAFE modules respectively in a two-branch framework to balance efficiency and effectiveness,alleviate the vanishing-gradient problem and strengthen the feature propagation.To evaluate the effectiveness of the proposed method,the experimental results were carried out on bench mark HsI datasets,demonstrating that TBMSSN obtained higher classification accuracy compared with several state-of-the-art methods.
摘要建立能兼顾多元素地球化学空谱特征、有效拟合数据复杂分布的检测模型,是识别异常区域的关键.针对新疆东昆仑高海拔深切割浅覆盖地区地球化学找矿异常提取难题,本研究提出一种空谱特征-空间关联双分支模型(Spatial-Spectral Feature and Global Spatial Correlation Network,SSGSNet),空谱特征分支基于ResNet残差块,融入双重注意力模块提取局部空谱特征;空间关联分支通过patch嵌入和自注意力机制挖掘全局空间关联特征.融入构造数据提高了地球化学综合异常找矿的准度,SHAP值也解释了模型中断裂的关键作用.实验结果表明,SSGSNet模型的AUC值达0.945 3,显著优于ResNet、ViT单模型和普通的空谱双分支模型.野外查证显示,遥西、巴什干克等4处高异常区均发现不同程度金矿化现象,证实该模型可有效解决复杂背景下地球化学异常信息提取难题,为覆盖区矿产勘探提供了可靠的技术支撑与靶区指导.