Study of active millimeter-wave image speckle reduction by Hadamard phase pattern illumination.
Study of active millimeter-wave image speckle reduction by Hadamard phase pattern illumination.
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Hadamard相位图照明主动毫米波图像散斑抑制研究。
DOI：
10.1364/josaa.25.000312
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发表时间：
2008
期刊：
影响因子：
--
通讯作者：
J. Stiens
中科院分区：
文献类型：
--
作者：
G. Koers;I. Ocket;Q. Feng;V. Tavakol;I. Jäger;B. Nauwelaers;J. Stiens
由于人造毫米波源的相干性，主动毫米波图像通常表现出特征散斑噪声。我们研究了已成功应用于毫米波成像激光投影系统的Hadamard散斑对比度降低（SCR）技术。我们展示了阿达玛图案的顺序和尺寸以及图像和图案分辨率对散斑消减效率的影响。讨论了阿达玛模式实现的实际局限性及其对散斑消减效率的影响。
Active millimeter-wave images typically exhibit characteristic speckle noise, due to the coherence of artificial millimeter-wave sources. We study the Hadamard speckle contrast reduction (SCR) technique, which has been successfully used in laser projection systems, in the context of millimeter-wave imaging. We show the impact of Hadamard pattern order and size and of image and pattern resolution on speckle reduction efficiency. Practical limitations of Hadamard pattern implementations and their effect on speckle reduction efficiency are also discussed.