| 基于可变步长的光谱响应曲线分形维计算方法研究 |
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| 引用本文： | 吕凤华,舒宁,陶建斌,付晶.基于可变步长的光谱响应曲线分形维计算方法研究[J].国土资源遥感,2011,22(1):37-41. |
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| 作者姓名： | 吕凤华 舒宁 陶建斌 付晶 |
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| 作者单位： | 1. 武汉大学遥感信息工程学院,武汉,430079
2. 武汉大学测绘遥感信息工程国家重点实验室,武汉,430079 |
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| 基金项目： | 国家973项目“对地观测数据-空间信息-地学知识的转化机理”（编号： 2006CB701303）资助。 |
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| 摘 要： | 提出了一种基于可变步长(即基于不同采样率)的高光谱图像响应曲线分形维计算方法.该方法在不同的采样率下对光谱响应曲线进行采样,计算相邻点的光谱响应差值,统计采样点的差值总和,利用最小二乘法求出分形维.为了提高计算效率,运用多线程的技术将高光谱图像分成几个部分,各部分的分形维由多核计算机同时并行计算.实验结果表明,该方法能...
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| 关 键 词： | 分形维 高光谱图像 改进分形维计算 多线程 |
| 收稿时间： | 2010-05-31 |
| 修稿时间： | 2010-07-26 |
Variable Step Size-Based Estimation of Fractal Dimension for Spectral Response Curve |
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| LV Feng-hua,SHU Ning,TAO Jian-bin,FU Jing.Variable Step Size-Based Estimation of Fractal Dimension for Spectral Response Curve[J].Remote Sensing for Land & Resources,2011,22(1):37-41. |
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| Authors: | LV Feng-hua SHU Ning TAO Jian-bin FU Jing |
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| Institution: | 1(1.School of Remote Sensing and Information Engineering,Wuhan University,Wuhan 430079,China;2.State Key Laboratoryof Information Engineering in Surveying,Mapping,and Remote Sensing,Wuhan University,Wuhan 430079,China) |
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| Abstract: | This paper proposes an algorithm based on the variable step estimation of fractal dimension for spectral response curve of hyperspectral image. The algorithm carries out sampling on the spectral response curve at different sampling rates, computes the differential value between two consecutive points, and then counts the total sum of differential values about these sampling points. Finally, the fractal dimension is calculated by using the least squares method. To improve computation efficiency, the algorithm divides the hyperspectral image into several parts by using the multi-thread technology and then estimates the fractal dimension by the parallel computation of the polynuclear computer. Experimental results indicate that the algorithm is effective in that it solves the problem of computational inefficiency, low-fidelity, and weak separability in the algorithm of grid and step. |
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| Keywords: | Fractal dimension Hyperspectral image Estimation algorithm of fractal dimension Multi-thread |
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