CAJ | 학술논문

传统的Hu不变矩直接针对原图计算，计算量大、实时性不够理想，且受强噪声影响明显，特征描述也不是很准确。文中在不变矩理论的基础上结合Schlick镜面指数简化公式，给出一种将边缘线矩作为识别特征的提取方法。该方法只需对边缘映射图计算不变矩，不必直接在原图上计算，因而避免了不必要的误差，再经过简化指数计算，降低复杂度、减少计算量的同时提高了实时性。最后针对该方法的效率和特征提取性能进行了实验，结果表明该方法快速有效，很好地兼顾了速度与精度。
전통적Hu불변구직접침대원도계산，계산량대、실시성불구이상，차수강조성영향명현，특정묘술야불시흔준학。문중재불변구이론적기출상결합Schlick경면지수간화공식，급출일충장변연선구작위식별특정적제취방법。해방법지수대변연영사도계산불변구，불필직접재원도상계산，인이피면료불필요적오차，재경과간화지수계산，강저복잡도、감소계산량적동시제고료실시성。최후침대해방법적효솔화특정제취성능진행료실험，결과표명해방법쾌속유효，흔호지겸고료속도여정도。
Traditional Hu invariant moment is calculated directly in allusion to the original figure, of which the calculation amount is large,real-time performance is not ideal enough,noise effect is obvious and feature description is not accurate enough. In this paper,on the basis of the moment invariant theory,combined with the Schlick's index simplified formula of mirror model,give an extraction meth-od that takes edge-based line moment as recognition feature. This method,with no need to calculate directly on the original figure,only needs to calculate the invariant moment of the edge mapping figure. Thus the calculation amount is decreased and unnecessary errors are avoided,through the simplified index calculation,reducing the complexity and improving real-time. Finally,experiments on the efficiency and performance of the feature extraction are conducted,which shows that this method is effective,rapid and gives good consideration to both speed and accuracy.