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相干斑滤波
相关语句
  speckle filtering
     A NEW METHOD FOR SPECKLE FILTERING OF SAR IMAGES
     一种新的SAR图像的相干斑滤波方法
短句来源
     Therefore speckle filtering technique is one of the important problems in the application of SAR.
     因此,相干斑滤波技术是SAR应用的重要课题之一。
短句来源
     To evaluate the preformance of synthetic aperture radar (SAR) coherent speckle filtering algorithms, an evaluation system is proposed, including nine criteria: equivalent number of looks (or smoothing index), radiometric resolution, loss of the signal to clutter ratio, signal radiometric loss, bias, spatial resolution loss, edge keeping index, bias of the peak sidelobe rate and bias of integration sidelobe rate.
     为了评价合成孔径雷达(syntheticapertureradar,SAR)图像相干斑滤波算法性能,提出了一个性能评价体系,其中包含9项指标:等效视数(或平滑指数)、辐射分辨率、信号杂波比损失、信号辐射度损失、均值偏差、空间分辨率损失、边缘保持指数、峰值旁瓣比偏差、积分旁瓣比偏差。
短句来源
     Test results of the real and simulated SAR images and typical speckle filtering algorithms show that these criteria are effective and in accordance with the visual assessment.
     通过用真实图像和模拟SAR图像对典型相干斑滤波算法的检验,表明了评价指标的有效性。
短句来源
     This paper focuses on the research of speckle filtering algorithms of SAR image and obtains some useful conclusions.
     本文以机载合成孔径雷达图像相干斑滤波算法为研究内容,得出了一些有益的结论。
短句来源
更多       
  coherent speckle filtering
     To evaluate the preformance of synthetic aperture radar (SAR) coherent speckle filtering algorithms, an evaluation system is proposed, including nine criteria: equivalent number of looks (or smoothing index), radiometric resolution, loss of the signal to clutter ratio, signal radiometric loss, bias, spatial resolution loss, edge keeping index, bias of the peak sidelobe rate and bias of integration sidelobe rate.
     为了评价合成孔径雷达(syntheticapertureradar,SAR)图像相干斑滤波算法性能,提出了一个性能评价体系,其中包含9项指标:等效视数(或平滑指数)、辐射分辨率、信号杂波比损失、信号辐射度损失、均值偏差、空间分辨率损失、边缘保持指数、峰值旁瓣比偏差、积分旁瓣比偏差。
短句来源
  “相干斑滤波”译为未确定词的双语例句
     A filter for suppressing speckle with wavelet is proposed. This method improved the traditional method.
     本文提出了一种基于小波分析的相干斑滤波方法,这种方法对传统的阈值法作了改进,滤波效果优于原来的阈值法。
短句来源
     Eperimental result shows that this algorithm is better than other existing speckle reduction methods.
     实验结果表明,本算法处理效果优于目前常用的相干斑滤波算法。
短句来源
     This paper analyzes the statistics of speckle in SAR. And based on wavelet transform, this paper puts forwards a new method for speckle suppression. After wavelet transform, Lce filter is adopted for HH part and CFAR(Constant False Alarm Ratio) is used for HG、GH、HH.
     该文分析了合成孔径雷达(SAR)图像中的相干斑(Speckle)的统计特性,基于小波变换(WT),提出了一种新的相干斑滤波方法,该方法将小波变换后的HH分量采用Lee滤波,对HG,GH和GG分量则利用恒虚警技术(CFAR),保留重要的目标和边缘,再将这四个分量进行重构。
短句来源
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  speckle filtering
Advantages of Adaptive Speckle Filtering Prior to Application of Iterative Deconvolution Methods for Optical Coherent Tomography
      
To compensate this, we rely on preliminary speckle filtering, and especially the adaptative ones, which allow tackling the speckle without blurring the image.
      
We first studied enhancement proposed by most popular IDMs on OCT images, and then the effect of preliminary adaptive speckle filtering (ASF) by different common adaptive methods.
      
First land areas should be masked out, and then is preprocessing of SAR image, such as speckle filtering.
      
Speckle filtering of medical ultrasound images represents a critical pre-processing step, providing clinicians with enhanced diagnostic ability.
      
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A new adapted speckle filtering algorithm is presented on the speckle noise statistics in thispaper,which is able to reduce the speckle noise and selete filtering window for SAR images .The algorithm is presented for application to SeasatAR images.The experimental rcsults are comparised with that ofLee and Oddy s,which operates along similar computational principles.The quantitative comparison resultsassess that our algorithm may be a more robust one.

详细分析了合成孔径雷达图像中相干斑的统计特性,提出了一种具有窗口自选功能的自适应相干斑滤波算法,并将该算法用于Seasat-ASAR图像的滤波处理;并将滤波结果与Lee算法和Oddy算法作了对比试验,其结果表明滤波性能优于Lee算法和Oddy算法。

The coherent-imaging principle of Synthetic Aperture Radar causes speckle niose, which is the major problem of SAR images. According to the characteristics of SAN image details and speckle distribution, this peper puts forward a speckle-reduction algorithm based on region division. This algorithm can protect edge-characteristics of SAR image, along with a very good speckle reduction effort. Eperimental result shows that this algorithm is better than other existing speckle reduction methods.

合成孔径雷达(SAR)因为相干成像原理所固有的相干斑噪声是影响其图像质量的主要原因。文中根据SAR图像的纹理特征和相干斑噪声的统计特征,提出了一种基于区域分集的相干斑抑制算法。本算法能够完全保留SAR图像边缘特征,同时对相干斑具有较好的抑制能力。实验结果表明,本算法处理效果优于目前常用的相干斑滤波算法。

This paper analyzes the statistics of speckle in SAR. And based on wavelet transform, this paper puts forwards a new method for speckle suppression. After wavelet transform, Lce filter is adopted for HH part and CFAR(Constant False Alarm Ratio) is used for HG、GH、HH. This method not only improves the ENL of images, but also keeps the important targets and edge. Compared with Lee algorithm that was generally used in SAR speckle filtering, this new method has the great advantage in speckle suppression and edge...

This paper analyzes the statistics of speckle in SAR. And based on wavelet transform, this paper puts forwards a new method for speckle suppression. After wavelet transform, Lce filter is adopted for HH part and CFAR(Constant False Alarm Ratio) is used for HG、GH、HH. This method not only improves the ENL of images, but also keeps the important targets and edge. Compared with Lee algorithm that was generally used in SAR speckle filtering, this new method has the great advantage in speckle suppression and edge keeping. The experimental results prove the effectiveness of the method.

该文分析了合成孔径雷达(SAR)图像中的相干斑(Speckle)的统计特性,基于小波变换(WT),提出了一种新的相干斑滤波方法,该方法将小波变换后的HH分量采用Lee滤波,对HG,GH和GG分量则利用恒虚警技术(CFAR),保留重要的目标和边缘,再将这四个分量进行重构。实验结果表明,该方法具有相当良好的相干斑抑制性能,等效视数得以大幅度提高,并且能很好地保持原图像的边沿特征,其性能明显优于通常采用的Lee算法。

 
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