利用红外热成像系统可将物体的热分布转化为可视图像，并在监视器上以灰度级或伪彩色显示出来，从而得到被测目标的温度分布场。根据热成像测温原理以及红外图像的特点，在对室温热成像系统研究的基础上，对红外图像伪彩色编码进行了研究，提出一种新的伪彩色编码方法，即自动阈值法。利用自动阈值法可以在室温环境下，对目标的温度及其分布进行测量。在TMS320C6202和FPGA室温热成像系统中对提出的方法进行了验证。实验结果表明，该方法可使红外图像层次分明，容易分辨出不同的温度区域。

The thermal distribution of objects can be transformed into the visual pictures by the infrared thermal imaging system and displayed on the monitor in grey level or pseudo-color,thus the temperature distribution of objects can be obtained. According to the thermal imaging principle of temperature measurement and the characteristics of infrared images,the pseudocolor coding of infrared images is studied in this paper. A new pseudo-color coding,automatic threshold method,is presented. This method was proved by TMS320C6202 and FPGA thermal imaging systems at room temperature. Experimental results show that gradations of infrared images can be discriminated and different temperature regions can be easily resolved by the method.