matlab实现的图像的旋转并截取功能，假如有一张图片，图片中有一个飞机，飞机是斜着的，需要将飞机旋转水平，并算出飞机四个角的坐标，这是对一系列图片进行处理-matlab implementation of the image rotation and the interception function, if there is a picture, the picture there is an aircraft, the aircraft is placed at an angle, and