提出了一种基于目标边界的不变特征提取方法。导出了用物体角点坐标表示的低阶边界矩的闭合形式，构造了

基于边界矩的仿射变换不变量。该方法只需要对物体角点进行简单的代数运算，因此，该方法简单明了，计算量很小。实

验结果证明了该方法的有效性-A goal of the border based on the same feature extraction method. Exporting objects with corner coordinates of the low-level closed-form moments border, the border based on structure moment invariants of affine transformation. This method only corner of the object algebra simple, so simple that the method, the calculation is very small. Experimental results show the effectiveness of the method