中文说明：使用matlab对红外图像进行处理，求取其最小外接矩形，方便后续计算目标长宽高、面积、矩形度等一系列参数。
English Description：
Matlab is used to process the infrared image to get the minimum circumscribed rectangle, which is convenient for the subsequent calculation of a series of parameters such as the length, width, height, area, and rectangularity of the target.