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 the need to rotate the aircraft level, and calculate the coordinates of the four corners of the aircraft, which is a series of image processing