摘要
研究安装了煤泥浮选泡沫数字图像获取系统 ,通过大量的分批浮选实验 ,获取了许多煤泥精矿泡沫图像 ;分析了煤泥浮选泡沫数字图像的特点 ,探讨了用灰度绝对值来刻画泡沫图像特征的可行性 ;引入了空间灰度相关矩阵和邻域灰度相关矩阵来提取泡沫的纹理特性 ,并提取基于这两种算法的一系列特征参数来描述泡沫的结构 ;开发了煤泥浮选泡沫特征参数提取软件 ,并用其完成了精矿泡沫图像特征参数提取工作 ;分析了各泡沫特征参数随浮选时间 (泡沫纹理 )的变化关系 ,定性地指出了各泡沫特征参数与泡沫纹理的相关性。
Coal flotation is a complex procedure, which is influenced by the chemical physical properties of coal surface, the hydrodynamic of pulp, and many manipulated variables The control of flotation is now far from satisfaction Flotation froth is a vital medial variable, which involves a lot of information related with the procedure variables and flotation results In this study, an experimental flotation column is designed and made, and an experimental system is set up for acquiring froth image By conducting a lot of batch cell flotation experiments, a series of froth images are acquired On the basis of analysis of flotation froth image's visual characteristics, the feasibility of describing the feature of coal froth using gray level is discussed It is found impossible to characterize the coal froth image only in terms of absolute gray level values of pixels Furthermore, two algorithms the spatial gray level dependence matrix and the neighboring gray level dependence matrix are introduced to extract the visual textural characteristics Based on these two matrixes, a series of feature measures are proposed to describe the coal froth visual characteristics By employing software system developed by the authors using DELPHI language under Windows environment, a series of feature measures based on the spatial gray level dependent matrix and the neighboring gray level dependent matrix are extracted The change tendency of each feature measures with the flotation time is analyzed, and the relationship between each feature measure and froth textural feature is pointed out qualitatively
出处
《燃料化学学报》
EI
CAS
CSCD
北大核心
2002年第3期198-203,共6页
Journal of Fuel Chemistry and Technology
基金
国家自然科学基金 (5 99740 3 2 )~~
