基于聚焦深度的沥青路面微观纹理三维图像重构方法研究  

Research on Asphalt Pavement Micro-texture 3D Image Reconstruction Method Based on Focusing Depth

作　　者：周兴林[1] 张云[1] 蒋难得[1] 胡怡玮[1] 谢旭飞[1] 

机构地区：[1]武汉科技大学汽车与交通工程学院,湖北武汉430081

出　　处：《公路交通科技》2014年第9期6-12,共7页Journal of Highway and Transportation Research and Development

基　　金：国家自然科学基金项目(50978207;51378243)

摘　　要：沥青路面微观纹理三维图像重构是研究其微观性能的基本方法之一,针对国内外沥青路面微观纹理三维图像重构方法的不足,运用聚焦深度法,通过单目体视显微镜沿垂直沥青试块表面方向拍摄序列图像,采用改进的Laplacian聚焦算子进行序列图像融合并确定融合图像中每点所属的高度层次,用高斯插值算法得到每点准确的高度值,进而实现沥青路面微观纹理三维重构。与激光轮廓仪测量的断面轮廓线进行对比分析,验证了其精度和可行性。试验结果表明该方法可以高精度重构沥青路面三维微观纹理。Asphalt pavement micro-texture 3D image reconstruction is one of the basic methods to study its microscopic property. Aiming at lack of research about it in China and aboard,by using focusing depth method,the sequential images along the direction perpendicular to the surface of the asphalt specimen are captured by monocular stereo microscope. The sequential images are fused and confirmed the height level of each point in the fused image using the improved Laplacian operator. Then,the exact height of each point is obtained using Gaussian interpolation algorithm,and 3D reconstruction of asphalt pavement micro-texture is achieved. By comparing with the sectional contour measured with laser profilometer,the accuracy and feasibility of the exact height is verified. The result shows that the method can accurately reconstruct the 3D micro-texture of asphalt pavement.

关 键 词：道路工程 沥青路面 三维重构 聚焦深度 微观纹理 机器视觉 

分 类 号：U416.2[交通运输工程—道路与铁道工程]