| 摘要: |
| 针对目前乳化沥青颗粒粒度分析手段的不足，提出一种基于数字图像处理技术的乳化沥青颗粒粒径计算方法.该方法分为3个主要步骤，首先得到乳化沥青颗粒的二值图像并填充二值化后乳化沥青颗粒图像中的孔洞；然后在二值图像的基础上利用分水岭算法再次切割粘连颗粒，并根据颗粒的形状因子剔除不完整颗粒；最后由显微成像系统标定的放大倍数和等效直径法计算颗粒的实际尺寸，进而统计颗粒粒径分布参数.与激光粒度分析对比表明，分析图像数量越多，两者越接近，当分析图像数量为100张时，两者的标准差达到0.55. |
| 关键词: 道路工程 乳化沥青 粒度 数字图像处理 |
| DOI：10.3969/j.issn.1007 9629.2013.01.015 |
| 分类号: |
| 基金项目:道路灾变防治及交通安全教育部工程研究中心开放基金项目（kfj080305）；湖南省自然科学基金资助项目(10JJ6073)；湖南省教育厅科学研究项目（10C0738）；国家自然科学基金资助项目（51208130） |
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| Calculation Method of Particle Sizes in Asphalt Emulsion Based on Digital Image Processing |
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ZHOU Ji1, TIAN Qiong2, YING Hong3, RUI Yong qin1
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1.Engineering Research Center of Catastrophic Prophylaxis and Treatment of Road & Traffic Safety, Ministry of Education, Changsha University of Science & Technology, Changsha 410004, China;2.College of Civil Engineering, Hunan University,Changsha 410082, China;3.College of Civil Engineering, Guilin University of Electronic Technology, Guilin 541004, China
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| Abstract: |
| To overcome the shortcomings of traditional measurement methods for particle sizes analysis of asphalt emulsion, a new measurement method based on the digital image processing for particle sizes calculation is proposed. This method is realized by three main steps:（1)filling the holes in the asphalt emulsion particles image after thresholding by Otsu algorithm; （2)cutting the linked particles by watershed algorithm in the binary image and eliminating the defective particles by the form factors from edges tracing algorithm; （3)calculating the actual particle sizes and the particle sizes distribution parameters according to the calibrated zoom factor of the microscopic image system and equivalent diameter method. The contrast with laser particle size analyzer shows that the results from image method analysis results are close to that from laser particle size analyzer as the image sample number increases and the standard deviation drops to 0.55 when the images number reaches 100. |
| Key words: road engineering asphalt emulsion particle size digital image processing |
