Abstract: The segmentation and 3D display method of infrared thermal image were studied. Infrared thermal detecting can not be implemented well because it can only get thermal sequence images, so it is needed to produce three-dimensional images of depth using 3D display technology. 3D display has a direct effect on image segmentation results, so a new algorithm of the region growing segmentation based on the minimization. It successfully extracted the target image of the defect elements and achieved a better result in the 3D display.