可见光偏振成像系统的微小目标检测

Small target detection in visible polarization imaging system

可见光偏振成像系统得到的微小目标图像特征较少,导致准确检测较为困难,基于此,本文设计一种可见光偏振成像系统的微小目标检测方法。根据可见光偏振成像系统获取图像原理,从多角度获取微小目标图像;通过图像空间位置,配准不同角度的目标图像,去除目标图像噪声,提取偏振特征;融合不同角度的目标图像,计算图像信息熵,增强检测目标;采用图像阈值分割的方式,划分目标图像范围,通过小面拟合的方式,完成微小目标检测。实验结果:应用该方法后检测到的微小目标图像品质因素高达0.99,图像信息熵、目标与背景对比度值较对比方法分别高0.2、0.25、0.19,0.03、0.05、0.03,检测到的微小目标具有较优的质量。

The visible polarization imaging system obtains less image features of small targets,which makes it difficult to detect accurately. Based on this,a small target detection method of visible polarization imaging system is designed in this paper. According to the image acquisition principle of visible light polarization imaging system,the micro target image is obtained from multiple angles;Through the spatial position of the image,the target images with different angles are registered,the noise of the target image is removed,and the polarization feature is extracted;The target images from different angles are fused,and the image information entropy is calculated to enhance the detection target;The target image range is divided by image threshold segmentation,and the micro target detection is completed by facet fitting. Experimental results: the image quality factor of micro target detected by this method is as high as 0. 99,the image information entropy and the contrast between target and background are 0. 2,0. 25,0. 19,0. 03,0. 05 and 0. 03 higher than that of the comparison method,respectively. The detected micro target has better quality.