For example of shape characteristic, we chose eccentricity, compactness, shape invariant quadrature, andFourier descriptors to combine characteristic vector, and carry on the experiment and make better result.

• 例如，就形状特征，本文抽取了离心率、紧致度、形状不变距和傅立叶描述符组成特征向量，进行实验并取得较好的效果。