定标黑体的温度稳定性对热成像的影响分析

定标黑体是红外扫描仪的重要组成部分，其性能的好坏会影响到红外成像的质量。以某次遥感飞行获取的海表热红外图像中出现明暗条纹的现象为例，分析了定标黑体的温度不稳定性对热红外成像的影响，主要是由于扫描仪中用于箝位的低温黑体控温精度低。针对该明暗条纹消除方法，介绍了常规的基于图像处理的“Laplacian噪声消除法”，并提出了一种新的解决方法“恒定参考源法”，通过对比这两种方法，认为在难以保证黑体控温精度的情况下，关闭黑体的温控功能是一种更好的解决方法，对于红外扫描仪的遥感应用具有一定的指导意义。

Analysis of effect of calibration blackbody temperature stability on the infrared imaging

Calibration blackbody is the important part of infrared scanner, its performance will affect the quality of infrared imaging. A case that light-and-shade stripes appearing periodically in the thermal infrared image of sea surface is described. And then effect of calibration blackbody temperature stability on the infrared imaging is analyzed. The cause of this phenomenon is that the blackbody temperature vibrates periodically. A normal method to eliminate these stripes is presented. And then a new method based on a stable reference source is presented and validated. And the two methods are compared. The result shows that it is better to turn off blackbody controller when it is very difficult to control blackbody temperature precision,and it is of significance for remote sensing application of infrared scanner.