基于红外热像波段拓展的多光谱成像研究

红外目标多光谱图像为目标红外辐射特性的研究提供了有效的手段,在目标材质识别、伪装目标辨识和复杂背景抑制等目标探测技术领域有着极为重要的应用。以黑体辐射理论为基础，提出了一种基于波段拓展的红外多光谱成像的方法。首先，利用中波红外热像仪（3～5 μm）采集红外图像，通过目标表面的真实红外辐射反推出热图像中不同像素点的温度值，然后利用普朗克公式可以获得不同像素点在预拓展波段处的辐射出射度数值，最后根据这些数值进行红外多光谱成像。

Research on Multispectral Imaging Based on Spectral Band Extension of Infrared Thermal Image

Multispectral imaging of the infrared target provides effective method for the study of infrared radiation characteristic. It has significant applications in many fields of detection technologies such as material identification, false-target discrimination, complex backgrounds suppression. Based on the blackbody radiation theory, a new spectral imaging method, which extends the spectral band of measured infrared image, is proposed. Firstly, the infrared thermal image is collected by the mid-wave infrared thermal imager (3～5 μm). The temperature value of different pixel of the thermal image is obtained by calculating the radiation. Then the corresponding radiation of the different pixels in the desired spectral band is acquired from the temperature through Planck formula. And finally the radiation data are quantified and represented as multispectral infrared images.