【作者】 邵建斌； 陈刚； 许联锋； 金上海；

【Author】 Shao Jianbin Chen Gang Xu Lianfeng Jin Shanghai(Institute of Hydraulics, Xi’an University of Technology, Shaanxi, Xi’ an 710048, China)

【机构】 西安理工大学水利水电学院水力学研究所；

【摘要】 现有的气泡运动图像识别提取的方法没有考虑照明光源照度的变化特点.本文首先分析了普通照明光源下所摄取气泡运动图像的灰度变化特征,以及气泡本身相对于背景的灰度变化特点,在此基础上,提出了一种新的气泡识别方法,在气泡不多的情况下,取得了比较理想的效果.更多还原

【Abstract】 Illumination characteristics are utilized to extract bubbles in digital image measurement of bubbly flows. Based on an analysis of features of bubble image brightness variation with time, and difference between bubble brightness and image background, a novel bubble recognition method is proposed. The experiment shows that this method can give satisfactory results under the condition of low void-fraction.更多还原