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1.In this paper, a nonlinear multiwavelet transform adaptive threshold value method is proposed to suppress speckle noise.
摘要文章提出了一种新的用于斑点噪声抑制的非线性多小波变换自适应阈值算法。收藏指正
2.A novel approach of speckle noise reduction is put forward according to the distributions of signal and noise under different scales of Synthetic Aperture Radar (SAR) images based on Wavelet Packet Transform (WPT).
根据信号和噪声的小波系数在不同分解尺度上的分布,提出应用小波包变换(WPT)消除合成孔径雷达(SAR)图像斑点噪声的新方法.收藏指正
3.Experimental result shows the algorithm has nearly the same edge preserving performance as nonlinear multiwavelet transform, and nearly the same speckle noise suppression performance as filtering.
此算法对原图像进行多小波变换，然后在不同尺度，不同方向进行自适应阈值处理，仿真结果表明：本算法能够有效地抑制了斑点噪声，又保留有用信号及边缘信息。收藏指正
4.Because there is speckle noise in SAR image and the background clutter of water is usually very complex, weak target detection is a big challenge for conventional methods.
SAR图像存在相干噪声以及水面背景杂波的复杂性,传统方法对于弱目标检测存在困难。收藏指正
5.The experimental results show that excellent performance can be achieved: the image speckle noise is reduced effectively and the ENL is high, and the image quality is improved obviously.
经本文方法处理后的图像,其相干斑噪声得到了有效的抑制,具有较高的等效视数,明显地改善了图像的质量。收藏指正
6.The system operates on pulse limited mode, transmitting pulses are FM Chirp pulses, the returned signal is processed in receiver in frequency domain instead of time domain by adopting “Full De ramp” technique and frequency spectrum analysis method. Adaptive tracker can remove about 75% of the noise power. High pulse repetition rate results in maximum effective number of independent pulses and are best effective in eliminating ocean surface backscatter speckle noise.
系统工作在脉冲有限足迹方式，发射脉冲为线性调频（Chirp）脉冲，接收系统采用“全去斜坡”技术及频谱分析方法将海面回波信号从时域转换至频域处理，自适应跟踪器可抑制大于75％的噪声，高脉冲重复频率使有效独立脉冲数达到最大，保证最大限度地抑制海面斑点噪声；收藏指正
7.In order to further illustrate the character of the new method of iterative shift and add for astronomical image reconstruction, the inflence of additive detector noise on the speckle interferometry, the speckle masking and the iterative shift and add is analysed respectively.
为进一步说明天文像复原新方法———迭代位移叠加法的性质 ,对探测器的附加噪声在斑点干涉术、斑点掩模法和迭代位移叠加法中的影响分别进行了分析。收藏指正
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