基于目标边缘轮廓偏振特征的姿态分析初探

通过微面元理论的函数模型,基于红外偏振辐射传输方程,推导分析红外偏振角与目标表面折射率、反射率及探测角度等关系的数学模型,通过合理简化模型仿真得出偏振角随入射角的单调变化曲线;开展红外偏振成像试验,试验数据分析与仿真结果一致,这表明:目标边缘轮廓的偏振角特征与探测波长的相关性可以忽略,在目标与背景辐射相差较小的情况下,采用光谱辐射亮度对比度的方法无法区分目标,而通过偏振角对比度可以明显区分-目标边缘特征,并提出通过基于目标几何特征以及探测位置,反演解算目标的姿态信息的新方法.

Gesture analysis based on the polarization characteristics for the target edge contour

Polarization imagery can provide several parameters of targets, including spectrum, intensity, state of polarization, and shapes. Among these, the state of polarization is additional useful information. The paper establishes transmission equation of infrared polarized radiation that includes reflection and emission by micro-surface theory, and we deduce the mathematical model with respect to a lot of factors of angle of polarization. By simplifying the formula of angle of polarization reasonable, the simulated curves of angle of polarization is present humdrum direction changes along with detect azimuths consistent with the measured date in references. The model of angle of polarization is validated by the indoor experimentation and the outdoor experimentation, and the result shown that the angle of polarization characteristics of target edge contour is independent of detect wavelength. In addition, at the condition of the difference between target and background radiation is small, and that can distinguish the target edge contour by the angle of polarization contrast. At last, an method is put forward that is calculate the gesture information of target based on the geometry characteristic of target and the information of detest position.