SAR is a coherent imaging system, so SAR images contain lots of Speckle noise.
SAR是一种相干成像系统，因此所成图像含有大量的相干斑噪声。
One of the most important contents about coherent imaging laser radar range image processing is suppressing the background.
相干激光成像雷达距离像处理的一个重要内容就是进行背景抑制。
In the past 20 years, the imaging technique of ultrasound imaging equipment has made much progress in harmonic imaging, coherent imaging, Doppler imaging and frequency spectra analysis.
近20年来，超声成像设备在电脑超声成像技术，谐波成像技术，相干处理成像技术，多普勒频移成像技术，回波频谱分析技术等方面取得了重大进展。
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