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相干斑
相关语句
  speckle
    Speckle Suppress for SAR Images Based on Pyramidal Morphology Algorithm
    基于塔形形态算法的 SAR图像相干斑抑制(英文)
短句来源
    But as a result of the charasteristics of coherent imaging, the speckle is inevitably appeared in the SAR images and makes the processing, analysis and translation of SAR images extremely difficult.
    但是由于其相干成像的特殊性,因而在SAR图像中包含有大量的相干斑噪声,使得对SAR图像的处理、分析和解译非常困难。
短句来源
    After analysis the computer simulations show that these two kinds of filters are both effective in speckle reduction of SAR images.
    经分析和处理表明这两种算法用于 SAR图像滤波都能有效地去除相干斑噪声。
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  “相干斑”译为未确定词的双语例句
    The main contributions of this dissertation are as follows:1、 The statistical distribution model and their application of the coherent clutter in SAR images are detailedly analysized and investigated.
    1、详细分析和研究SAR图像相干斑杂波的统计分布模型和各种统计分布模型的适用性。 对几种广泛使用的典型非高斯数据分布模型(Gamma分布、Weibull分布、K分布、有限混合高斯和混合Gamma分布)的数学特点进行了详细讨论和分析,并给出了不同分布模型下参数向量的估计公式。
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  speckle
We found a new structure named solicitation speckle at the low latitude of the animal pole and near the micropylar apparatus between the ovum envelope and cell membrane in the zygote of fish.
      
The solicitation speckle similar to type I cortical alveoli was very purple in H.E.
      
Moreover, no membrane around the solicitation speckle in TEM was found.
      
In SEM, the solicitation speckle looked flocculent.
      
During cortical reaction, the solicitation speckle played a very important function in arousing cortical reaction.
      
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The formation of SAR image is success fully fulfilled by using the X-band raw data from SIR-C/X-SAR. First, a flow diagram that ca n clearly illustrate the whole process, detailed steps and relation between thes e steps of SAR imaging is given. It is also helpful in clearly explaining the role of geographic parameters, radar system parameters and Doppler parameters in these steps. Secondly, brief description is given to all detailed steps includi n g imaging algorithm selection, compression in range, estimation...

The formation of SAR image is success fully fulfilled by using the X-band raw data from SIR-C/X-SAR. First, a flow diagram that ca n clearly illustrate the whole process, detailed steps and relation between thes e steps of SAR imaging is given. It is also helpful in clearly explaining the role of geographic parameters, radar system parameters and Doppler parameters in these steps. Secondly, brief description is given to all detailed steps includi n g imaging algorithm selection, compression in range, estimation of Doppler centr oid and Doppler frequency rate, compression in azimuth, multi-look processing f or reducing speckle and post-processing of image for improving gradation, etc. Finally, some important intermediate results and parameters are given, and fina l imaging results are shown.

作者用 SIR-C/X-SAR的 X波段 SAR的原始数据 ,实现了真实数据 SAR的成像。本文给出了成像实现的完整过程、具体步骤以及各步骤间的关系 ,包括成像算法选择、距离向线性调频脉冲压缩、多普勒中心估计、多普勒频率变化率估计、方位向压缩处理、降低相干斑的多视处理以及改善图像层次的后处理等 ,对各步骤进行了扼要叙述 ,并以框图的形式明确表示了成像几何参数、雷达系统参数、多普勒参数等与各步骤间的关系。此外还给出了部分主要中间结果与参数 ,以及最后的成像结果。

A Pyramidal Morphology Algorithm is developed for speckle reduction of SAR images in this paper. For reducing the loss of information in the pyramidal algorithm for morphology processing, in this modified algorithm, the sub images are processed parallel in the downsampling operation and the sub images are reconstructed in the upsampling operation. It can be applied to image filtering parallel. After analysis the computer simulations show that these two kinds of filters are both effective in speckle reduction...

A Pyramidal Morphology Algorithm is developed for speckle reduction of SAR images in this paper. For reducing the loss of information in the pyramidal algorithm for morphology processing, in this modified algorithm, the sub images are processed parallel in the downsampling operation and the sub images are reconstructed in the upsampling operation. It can be applied to image filtering parallel. After analysis the computer simulations show that these two kinds of filters are both effective in speckle reduction of SAR images. The modified parallel algorithm does better than the original algorithm and Lee filter on some characteristics.

提出将塔形形态算法用于抑制 SAR图像中相干斑处理 ,为减少塔形处理中由于下采样造成的信息损失 ,从并行处理的角度出发 ,对塔形形态滤波器提出了改进 ,将下采样中的各子图同时进行形态滤波处理 ,在上采样中将各子图合并。经分析和处理表明这两种算法用于 SAR图像滤波都能有效地去除相干斑噪声。与塔形形态滤波、Lee滤波器算法比较 ,采用并行算法处理后图像的各项指标有明显的改善。

 
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