一种基于选通偏振成像的红外伪装识别方法研究

Method of infrared camouflage target recognition based on polarization-gated imaging

为解决红外伪装对传统热成像系统的干扰问题,达到在战场上识别红外伪装目标的目的,提出一种基于选通偏振成像的红外伪装识别方法。红外偏振图像的获取通过扫描机构对4个固定放置的偏振片选通实现。实验结果表明,该方法可以4帧/s的频率实现对场景红外偏振度图像的获取。得到的红外偏振度图像与原始红外辐射强度图像相比,灰度均值提高了14%、灰度标准差提高了42%、平均梯度提高了98%。

A method of infrared camouflage target recognition based on polarization-gated ima- ging was proposed, in order to prevent the infrared camouflage from disturbing the traditional thermal imaging system and recognize the IR camouflage targets on the battlefield. The acqui- sition of infrared polarization images was implemented through 4 fixed polarizers gated by scan- ner. Experiment result shows that the method can successfully acquire the IR polarization im- age at the rate of 4 f/s, meaning this method is real-time to a certain extent. Comparing with the original thermal intensity image, the polarization image has an increase of average gray- scale value up to 14%, gray-scale standard deviation up to 42% and average gradient up to 98%, meaning an ideal camouflage target recognition effect.