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为了准确测量大空隙排水沥青路面构造深度,采用现场试验和理论分析相结合的方法,对灰度图像法的影响因素进行了分析,主要研究了不同路面类型、不同拍摄高度和不同像素尺寸对测量构造深度的影响。结果表明:将相同条件下密级配沥青路面灰度系数应用到排水沥青路面,可以准确地测量大空隙排水沥青路面的构造深度;在拍摄图像时,距离路面表面垂直高度宜保持在20cm左右;在对图像进行灰度化处理时,图像的像素尺寸宜截取为3000×3000。研究为实际应用灰度图像法提供了理论和试验依据。
In order to accurately measure the structure depth of large void drainage asphalt pavement, the influence factors of grayscale image method are analyzed by the combination of field test and theoretical analysis. The effects of different pavement types, different shooting altitudes and different pixel sizes on the measurement The effect of tectonic depth. The results show that the grayscale pavement asphalt pavement gradation coefficient is applied to the drainage asphalt pavement under the same conditions, which can accurately measure the construction depth of the large void drainage asphalt pavement. When the image is taken, the vertical height from the pavement surface should be maintained at about 20cm. When the image is grayscale, the pixel size of the image should be taken as 3000 × 3000. The research provides theoretical and experimental basis for practical application of grayscale image method.