Comparison of different data processing methods in mural infrared nondestructive testing

Abstract

In this work, the stepped heating thermography was used to detect the ancient tomb murals in the early Yuan Dynasty. During the experiment, the heating and cooling processes were collected at the same time. The collected data will be post-processed using methods such as: Thermal Signal Reconstruction, Pulsed Phase Thermography, Principal Component Thermography, Thermal Tomography Method. By comparing the thermal images and results of different processing methods, it is found that different methods have different effects when facing different types of defects in the murals. The Thermal Tomography Method can reflect the depth information of the defects to a certain extent. Each method has its own advantages and disadvantages. In view of the complicated murals, various methods can be combined to more accurately and clearly identify the type of disease and the location and other information, while providing effective scientific means for the protection of cultural relics.