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数据融合技术又称多传感器数据融合或分布式传感,即对多类多源和多平台传感器数据进行组合,提供有关空间信息综合态势的一种数据处理技术。数据融合可分为:信号级数据融合、像素级数据融合、特征级数据融合和符号级数据融合。本文讨论了红外图像、可见光图像、多谱图像、雷达图像等的数据融合问题以及各级数据融合的方法。 相似文献
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《中国新技术新产品》2021,(11)
常规的国土空间规划方法存在规划后地图质量差的问题,为此引进地理大数据与GIS平台,对国土空间规划展开设计。为了确保国土空间规划方法的有效性,引进地理大数据技术,实时获取数据并掌握与国土空间相关的地质资料,对多源数据类型进行整理与获取。同时,融合多源数据清洗算法,转换国土空间多源数据结构,并融合多源数据,规划国土空间位置关系。此外,通过对比实验,设计的方法在完成空间规划后,地图质量相对较高。 相似文献
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小波变换遥感图像的数据融合 总被引:3,自引:0,他引:3
利用小波变换方法进行多卫星遥感图像数据融合,分析不同长度的小波基对融合图像的影响,从信息的保持性、视觉效果及运用灵活性等方面与IHS、PCA融合算法进行了比较,从而探讨这一新算法在遥感图像分析应用中的可行性。 相似文献
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多源数据融合的深度学习模型中,通常采用等比重的方式将不同类型信号的特征映射至融合层。然而,该过程忽略了非同源信号特征对最终识别效果贡献程度不一致的问题。为此,提出了一种基于双重注意力机制的深度学习模型。该模型首先采用通道注意力模块抑制同源信号内无关分量的影响,其次利用多源数据注意力模块自适应分配非同源信号特征的权重,然后对重新赋权的特征进行融合,最后利用分类器实现模式分类。将所提方法应用于异步电机故障诊断,结果表明,该方法平均识别准确率为99.74%,其诊断效果优于现有方法。 相似文献
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《中国工程科学》2019,(6)
为厘清我国海岸带海岛礁遥感近年来发展取得的成就以及存在的问题,本文摘选近十年来若干典型性研究,按照"近海陆域–潮间带–近海水域–海岛礁"的空间顺序进行综述和探讨。总体而言,海岸带的土地覆盖、海岸线等仍是当前遥感应用研究的热点;同时,随着我国经济的快速发展和城镇化出现的环境问题,地面沉降、海水入侵、潮间带生态监测、海水养殖、赤潮、岛礁证据等新兴遥感应用方向也取得大幅进展,有效支撑了国家海洋战略。但同时也发现使用的遥感数据自主性不强、遥感信息更新频率低、学科孤立发展难以满足实际需求等问题。建议加强国产多源数据协同、多学科交叉以及大数据云平台支持下的大范围与局部高精度自动化、常态化监测等。 相似文献
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针对空间遥感TM图象和SAR图象信息的特征层融合应用于地物分类,提出了一种结合Markov随机场和BP神经网络模型的多源遥感图象迭代分类方法。该分类方法与现有的基于Markov模型的分类器相比具有无须假设条件概率密度函数模型的优点;与BP神经网络分类器相比,由于其考虑了类别标号的空间相关性,提高了分类精度;有别于传统的上下文分类器:它是通过迭代过程中来实现分类的,在考虑了类别标号的空间相关性的同时 相似文献
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家庭远程医疗监护报警和咨询智能系统 总被引:12,自引:0,他引:12
介绍了家庭远程医疗监护和咨询智能系统,它综合运用数据融合、数据挖掘、小波分析、模式识别、人工智能等技术,能自动进行监护数据分析和异常情况识别及网络报警、远程实时诊断。给出了系统的硬件组成框图,家庭端软件结构组成框图、医疗监护中心端软件结构组成框图,介绍了系统的部分关键技术,基于小波变换的心电信号分析,结合数据挖掘和机器学习的自动建模方法,基于数据融合和识别推理的病人异常情况识别。该系统在微机Windows平台采用VC 实现,经仿真实验取得了满意的结果。 相似文献
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In scene-level classification of remote sensing, fusion of multi-feature can significantly boost the performance. However, most methods directly fuse the features of different modalities without considering the importance of each feature modality. Based on the above considerations, in this work, multi-modality features weighted residual fusion method is proposed. First, the extracted high-level and low-level features of the scene image are encoded into a unified feature representation. Then the reconstruction residuals of each modality of each scene class are calculated based on two representation-based classification, i.e. sparse representation (SR) and collaborative representation (CR). After fusing the weighted reconstruction residuals of these two modalities with SR and CR, the class label is assigned to the category with the smallest residual. We make extensive evaluations on two challenging remote sensing data sets. The comparison with the state-of-the-art methods demonstrates the effectiveness of our proposed method. 相似文献
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Schmitz CH Graber HL Luo H Arif I Hira J Pei Y Bluestone A Zhong S Andronica R Soller I Ramirez N Barbour SL Barbour RL 《Applied optics》2000,39(34):6466-6486
Instrumentation is described that is suitable for acquiring multisource, multidetector, time-series optical data at high sampling rates (up to 150 Hz) from tissues having arbitrary geometries. The design rationale, calibration protocol, and measured performance features are given for both a currently used, CCD-camera-based instrument and a new silicon-photodiode-based system under construction. Also shown are representative images that we reconstructed from data acquired in laboratory studies using the described CCD-based instrument. 相似文献
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Various image fusion methods have been developed and investigated for different remote sensing (RS) applications. Hyperspherical Colour Sharpening (HCS) method was recently proposed for World View-2 imagery. A limited study has been carried out to find the performance of HCS method for other datasets. In this paper, an experiment is engineered in which HCS method was applied on Indian remote sensing (IRS) datasets. The performance analysis of the method was carried by both qualitative and quantitative methods. In addition to that the quality of indices image for each method is compared to analyse the suitability of methods for various applications based on these indices. Brovey transformation (BT), principal component substitution (PCS), high pass filtering (HPF) and discrete wavelet transform-based principal component substitution (DWT-PCS) were also applied on the selected data and used in comparative analysis with the HCS method. The study reveals that HCS method outperforms in terms of the spectral fidelity, but produces some shortcoming for spatial resolutions. The quality of indices images show that BT and HCS methods do not hold the spatial details after fusion indices image computation, while indices from HPF, DWT-PCS and PCS hold some of spatial information injected into fused output. 相似文献
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Hou J 《Journal of the Optical Society of America. A, Optics, image science, and vision》2004,21(2):223-230
Based on the concept of common-path/common-mode adaptive optics, the time-sharing wave-front-sensing adaptive optics system contains only one Hartmann-Shack (H-S) wave-front sensor, which detects two aberrations in the beam path alternately. After data fusion of the two aberrations, the actuator voltage of the deformable mirror (DM) is obtained. How the disturbances of the slope data and the response matrix influence the DM's actuator voltage in the data fusion methods is discussed, and the effective upper limits are given. Feasible data fusion methods are tested, and experiments verify that the performance of the system is good. The time-sharing technique is limited in sampling rate and is suitable only for corrections of slowly changing phases, because the H-S wave-front sensor's sampling frequency must be adequate for the alternate detection of two aberrations. 相似文献
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目的 研究超声粘接检测的数据融合方法。方法 采用D-S证据理论。结果 提出了利用纵波、横波、板波等不同的超声探头检测金属与非金属粘接状态的融合方法,并进行了验证分析。结论 提出的方法是可行的。 相似文献
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