【摘要】 利用数字图像处理技术对拍摄的泥沙颗粒图像进行处理,提取泥沙颗粒轮廓及位置坐标,为实时测量推移质输沙率提供了基础。本文基于数字图像处理技术,阐述了图像轮廓提取的一些基础知识,介绍了三种常用的图像轮廓提取方法,展示了这三种方法轮廓提取的效果,并进行了对比分析,结果表明当所处理的图像包含不同粒径的泥沙颗粒时,边缘检测算法提取的泥沙颗粒数量效果最好。更多还原

【Abstract】 Digital image processing technology is useful for processing sediment particle images,extractingthe sediment particles contours and position coordinates,which provides the basis for real-time measure-ment of bedload sediment transport rate. Based on digital image processing technology in this paper,somebasic knowledge of image contour extraction were expounded,the three commonly used image contour ex-traction methods were introduced,the effects with the three methods about image contour extraction wereshowed,and the contrast analysis was carried out among them. The results show that when the processingof image containing different particle size of sediment particle,the research results that using edge detec-tion algorithm to extract the numbers of the sediment particles are best.更多还原