According to the shape features of mechanical design images, an asynchronous retrieval method based on weighted distance was proposed. The algorithm firstly got preliminary results from the image database by using the circumcircle distance feature, and then calculated the weighted distances between the input image and the preliminary results, by considering both the formal output positions and the Hu invariant moments feature. The experiments show that compared with the traditional methods, the proposed method gets higher precision and recall ratio.%根据机械设计图像的形状特征,提出一种利用加权距离实现的多特征异步检索方法.首先利用机械设计图像的外接圆距离特征进行初步检索,再结合初步检索结果集的位置计算输入图像和初步检索结果集的加权Hu不变矩特征距离,并据此获得最终的检索结果.实验表明,与单一特征的检索方法相比,该方法在机械设计图像检索中有更高的查准率和查全率.
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