红外偏振成像系统光学设计

物体的光学信息除了常见的光谱信息还包括偏振信息。对偏振信息的采集能够实现复杂背景下对特定目标的信息提取,特别是金属目标的信息提取。结合偏振成像的原理、组成和特点,采用共孔径共探测器长波红外偏振成像系统对目标信息进行提取,通过仿真软件进行分析,系统可探测到3 km远的车辆目标, 且成像质量良好。     

Rotation invariant pattern recognition with a volume holographic wavelet correlation processor

A volume holographic wavelet correlation processor for performing rotation invariant Pattern recognitionis suggested.It uses wavelet transform to get the digital edge extraction of the original object and a singlecircular harmonic component iS used as the matched filter to get good rotation invariance.The new filterused in this method is called wavelet circular harmonic component fllter (WCHCF).Simulation resultsvalidate the theory and the experiment to recognize human faces with any rotation angle shows the utilityof the newly proposed method.