光子学报, 2019, 48 (8): 0804001, 网络出版: 2019-11-28
分焦面偏振探测系统的卷积插值方法
Convolution Interpolation for Division of Focal Plane Polarimeter
应用光学 偏振光学 卷积插值 分焦面偏振探测系统 校正 图像处理 Applied optics Polarization optics Convolution interpolation Division of focal plane system Calibration Image processing
摘要
为了减小空间分辨率下降以及传统插值方法无法较好地适应单元不匹配等因素对分焦面偏振探测系统的影响, 提出了一种基于卷积插值的偏振信息解算方法.用标记、插值方法来提取偏振图像, 从而计算偏振信息.然后, 通过最小二乘法校正分焦面偏振探测系统, 校正后其偏振度误差小于2.5%, 偏振角误差小于0.25°.最后, 利用所提插值方法对不同的探测器与偏振光栅阵列组合实际成像.实验结果表明, 该方法能够有效降低空间分辨率下降的影响, 适应模块化的分焦面偏振探测系统.
Abstract
In order to reduce the effect of resolution reduction and mismatch between units caused by traditional interpolation method on division of focal plane polarimeter, a method of polarization information based on convolution interpolation was proposed. The labeling and convolution interpolation method was studied to extract the polarized image, thus to compute the polarization. Then, the detection system was calibrated by least square method. After calibration, the error of degree of polarization is less than 2.5% and error of angle of polarization is less than 0.25°. Finally, the proposed interpolation method was used to image in different occasions by changing differnet detectors and micro polarization arrays. The exprimental results show that the proposed method can effectively reduce the effect of resolution reduction and be well adapted to the modular division of focal plane polarimeter.
吴晨奇, 张然, 樊元义, 褚金奎. 分焦面偏振探测系统的卷积插值方法[J]. 光子学报, 2019, 48(8): 0804001. WU Chen-qi, ZHANG Ran, FAN Yuan-yi, CHU Jin-kui. Convolution Interpolation for Division of Focal Plane Polarimeter[J]. ACTA PHOTONICA SINICA, 2019, 48(8): 0804001.