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一种基于图像的沥青混合料矿料级配检测方法

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Keywords: 道路工程,沥青混合料,级配,矿料,边界矩形,图像处理

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Abstract:

通过对沥青混合料数字图像进行对比度拉伸、中值滤波、阈值分割、二值形态学运算以及颗粒分析,得到了各个集料颗粒的面积、周长、外接矩形和等效椭圆等特征参数,进一步对各参数进行统计分析,得到颗粒分析汇总数据,然后对分析汇总数据进行误差补偿,得到沥青混合料的矿料级配组成并绘制级配曲线。结果表明数字图像处理技术在沥青混合料矿料级配检测中具有检测效率高的优点;对比度拉伸以及中值滤波等运算可以消除图像采集过程中的瑕疵,使图像更有利于后续处理;基于图像的颗粒分析数据具有较好的相关性,通过差分修正可以得到与设计级配比较接近的检测结果;利用图像处理技术检测沥青混合料矿料级配是可行的,可以作为筛分方法的有效替代。

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