为了使在空间光调制器上易于实现的三元相位振幅滤波器在畸变容限、噪声抑制能力和相关峰尖锐度这3个指标上均能取得较好的性能，在最优折衷最大相关高度滤波器的基础上提出了最优折衷三元相位振幅滤波器，并研究了其设计方法。它只需最大化单个准则就能确定最优的临界线角度和支撑区域，简化了优化设计过程。实验结果表明：与二元纯相位滤波器相比，这种滤波器对于在30的旋转畸变范围内并存在复杂背景的目标能给出更尖锐的相关峰。这将提高相关峰探测的准确性。
Abstract
In order to enable Ternary Phase-amplitude Filters (TPAFs) to be implemented in commercially-available Spatial Light Modulators (SLMs) to offer good performances in distortion tolerance, clutter noise suppression and correlation peaks sharpness, OT-TPAFs (Optimal Tradeoff TPAFs) were proposed and the design method was researched. The optimal threshold line angle and region of support can be determined by maximizing a single criterion, so the design procedure was simplified. The experimental results indicate, compared with BPOFs (Binary Phase-only Filters), this kind of filters can give sharp correlation peaks for targets within 30 degrees rotation distortion range in complicated background, which enhances the detection veracity of correlation peaks.
关键词
光学相关识别 /
二元纯相位滤波器 /
空间光调制器 /
三元相位振幅滤波器 /
信息光学
{{custom_keyword}} /
Key words
optical correlation recognition /
information optics /
ternary phase-amplitude filters /
spatial light modulators /
binary phase-only filters
{{custom_keyword}} /
{{custom_sec.title}}
{{custom_sec.title}}
{{custom_sec.content}}
参考文献
[1]王培峰, 陈高峰, 华铁均, 等. 基于二元纯位相匹配滤波的光电混合模式识别[J]. 红外与毫米波学报, 2000, 19(2): 117-120.
WANG Pei-feng, CHEN Gao-feng, HUA Tie-jun, et al. The opto-electronic pattern recognition based on binary phase-only matched filter[J]. Journal of Infrared and Millimeter Waves, 2000, 19(2): 117-120. (in Chinese with an English abstract)
[2]沈学举, 王永仲, 姚广涛. 非约束纯相位空间匹配滤
波器设计研究[J]. 光子学报, 2007, 36(5): 945-948.
SHEN Xue-ju, WANG Yong-zhong, YAO Guang-tao. Research on unconstrained phase-only matched filtering design[J]. Acta Photonica Sinica, 2007, 36(5): 945-948. (in Chinese with an English abstract)
[3]VIJAYA KUMAR B V K, BAHRI Z. Efficient algorithm for designing a ternary valued filter yielding maximum signal to noise ratio[J]. Applied Optics, 1989, 28(10): 1919-1925.
[4]FLANNERY D L, PHILLIPS W E, REEL R L. A case study of
{{custom_fnGroup.title_cn}}
脚注
{{custom_fn.content}}
