Because of passive work, strong anti-jamming and target recognition ability, around the clock in infrared imaging and so on, infrared detection and diagnosis technology came into being. Most developed countries have been used for military,industrial and other industries. Image mosaic is processing two or more overlapping image to a large scale image. It introduces several methods and development processing of image mosaic technology, and aiming at infrared diagnostics technology of power system, combined with the characteristics of infrared on-line detection,use phase correlation method for seamless mosaicing of infrared image, which makes the diagnosis more accurate, more convincing,and the experiment illustrates the feasibility and effectiveness.%由于红外成像具有被动工作、抗干扰性强、目标识别能力强、全天候工作等特点,红外检测诊断技术应运而生.已被多数发达国家用于军事、工业等各行各业.图像拼接是把两幅有重叠的图像叠加成一幅大尺度图像的过程.文中介绍了图像拼接技术的几种基本方法和发展历程,并针对电力系统红外诊断技术,结合红外在线检测的特点,应用相位相关方法对红外图像进行无缝拼接,使得诊断结果更精确、更有说服力,并且实验说明了方法的可行性和有效性.
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