中文摘要：

为了准确地计算砂、石等混凝土骨料颗粒的圆形度，提出了一种基于Matlab图像处理技术和8链码法的砂、石颗粒圆形度的计算方法，并利用MATALB语言编制了图像分析与圆形度计算程序，利用该程序实例分析了砂、石颗粒的多角度数码图像，获得不同角度下图像区域的圆形度。结果表明，对于同一颗粒选取不同角度的数码图像，其统计结果更具有代表性。

英文摘要：

In order to calculate circularity of concrete aggregate such as sand and stone granules accurately,a computational method for sand and stone particle circularity,which based on Matlab image processing technology and eight chain code method,is presented;utilizing MATLAB language draw up image analysis and calculation of circularity program,using the program instance analyze sand and stone particles multi-angle digital images,and obtain circularity under different angles of the image area.The result indicates that select different angle of the same digital particle image,its statistic results are more representative.