Then we extract the geometry features of image, including: size features, figure features, the ratio of long to broad and the triangle area ratio of the same hemline etc.

• 然后提取图像几何特征向量，包括：飞机图像的中心、尺寸特征、形状特征、机长翼展比(体态比)、同底三角形面积比向量等。