准确、快速、低成本的获取高潜水位煤矿区沉陷耕地的面积、分布、受损等信息对耕地保护有重要的意义。色彩空间转换、纹理分析和植被指数等方法能够有效的增强和挖掘影像潜在的信息,对信息提取有很大帮助。利用2018年4月获取的无人机可...准确、快速、低成本的获取高潜水位煤矿区沉陷耕地的面积、分布、受损等信息对耕地保护有重要的意义。色彩空间转换、纹理分析和植被指数等方法能够有效的增强和挖掘影像潜在的信息,对信息提取有很大帮助。利用2018年4月获取的无人机可见光影像对典型高潜水位煤矿区--山东兖州兴隆庄煤矿的沉陷耕地进行了提取研究。首先统计了耕地、积水区等地物在可见光三波段的均值和标准差,比较发现耕地与积水区在红、绿、蓝3个波段均有重合。其次对研究区影像进行了色彩空间转换与二阶矩阵纹理滤波,统计了耕地与积水区共27项色彩与纹理特征指标,利用均值和标准差计算了变异系数和相对差异值,最终选取色度(变异系数26%,相对差异73.33%)和绿色信息熵(变异系数20.59%,相对差异72.79%)作为耕地提取的最优特征,采用最大似然法进行耕地提取。之后计算了备选的6种可见光植被指数,根据结果分布图,选取了过绿指数EXG(excess green index)、可见光差异植被指数VDVI(visible-band difference vegetation index)、红绿蓝植被指数RGBVI(red green blue vegetation index)及归一化绿红差异指数NGRDI(normalized green-red difference index)作为沉陷耕地提取指数,利用双峰阈值法确定了耕地提取阈值。比较提取结果得出,EXG和NGRDI指数无法全面、客观反映研究区实际情况,VDVI指数的耕地总体分类精度为81.05%,高于RGBVI指数的71.38%,是本研究中最适用于高潜水位煤矿区沉陷耕地提取的指数。最后利用验证区影像,以基于样本面向对象提取的沉陷耕地面积作为参考值,通过比较面积及误差得出,基于色彩与纹理特征法提取的面积与参考面积更接近,误差(6.8%)小于可见光植被指数法(16.0%),更适用于高潜水位煤矿区沉陷耕地的提取。本研究结果客观反映了由于采煤沉陷导致耕地颜色、纹理、疏密等变化特征,为�展开更多
The evaluation of consolidated cultivated land quality can provide basic information for how to perfect the program of land consolidation,as well as a reference for the dynamic monitoring of farmland quality in mining...The evaluation of consolidated cultivated land quality can provide basic information for how to perfect the program of land consolidation,as well as a reference for the dynamic monitoring of farmland quality in mining area. Based on the consultation and analysis of related literature,we can conclude that: firstly,most scholars focus on soil consolidation,while consider little about land use and economic condition. Secondly,foreign scholars usually use crop yields to judge the success of land consolidation,while domestic scholars have been evaluated the quality of consolidated cultivated land synthetically from several aspects,such as soil fertility,soil environmental quality,and farmland infrastructure conditions. Specifically,most of the evaluations are static,and indicators are different. Besides,the quality of consolidated cultivated land is generally low,and it lacks systematic research on technologies for improving quality of cultivated land consolidated from coal mining subsided land. It is concluded that future researches should focus on establishing scientific and feasible evaluation system to realize comparison of quality change in the dynamic course of " undisturbed-subsided-consolidated" cultivated land in coal mining areas,as well as technologies for improving quality of cultivated land consolidated from coal mining subsided land.展开更多
文摘准确、快速、低成本的获取高潜水位煤矿区沉陷耕地的面积、分布、受损等信息对耕地保护有重要的意义。色彩空间转换、纹理分析和植被指数等方法能够有效的增强和挖掘影像潜在的信息,对信息提取有很大帮助。利用2018年4月获取的无人机可见光影像对典型高潜水位煤矿区--山东兖州兴隆庄煤矿的沉陷耕地进行了提取研究。首先统计了耕地、积水区等地物在可见光三波段的均值和标准差,比较发现耕地与积水区在红、绿、蓝3个波段均有重合。其次对研究区影像进行了色彩空间转换与二阶矩阵纹理滤波,统计了耕地与积水区共27项色彩与纹理特征指标,利用均值和标准差计算了变异系数和相对差异值,最终选取色度(变异系数26%,相对差异73.33%)和绿色信息熵(变异系数20.59%,相对差异72.79%)作为耕地提取的最优特征,采用最大似然法进行耕地提取。之后计算了备选的6种可见光植被指数,根据结果分布图,选取了过绿指数EXG(excess green index)、可见光差异植被指数VDVI(visible-band difference vegetation index)、红绿蓝植被指数RGBVI(red green blue vegetation index)及归一化绿红差异指数NGRDI(normalized green-red difference index)作为沉陷耕地提取指数,利用双峰阈值法确定了耕地提取阈值。比较提取结果得出,EXG和NGRDI指数无法全面、客观反映研究区实际情况,VDVI指数的耕地总体分类精度为81.05%,高于RGBVI指数的71.38%,是本研究中最适用于高潜水位煤矿区沉陷耕地提取的指数。最后利用验证区影像,以基于样本面向对象提取的沉陷耕地面积作为参考值,通过比较面积及误差得出,基于色彩与纹理特征法提取的面积与参考面积更接近,误差(6.8%)小于可见光植被指数法(16.0%),更适用于高潜水位煤矿区沉陷耕地的提取。本研究结果客观反映了由于采煤沉陷导致耕地颜色、纹理、疏密等变化特征,为�
基金Supported by the National Science and Technology Project in the Twelfth Five-Year Plan Period(Grant No.:2011BAD04B03)
文摘The evaluation of consolidated cultivated land quality can provide basic information for how to perfect the program of land consolidation,as well as a reference for the dynamic monitoring of farmland quality in mining area. Based on the consultation and analysis of related literature,we can conclude that: firstly,most scholars focus on soil consolidation,while consider little about land use and economic condition. Secondly,foreign scholars usually use crop yields to judge the success of land consolidation,while domestic scholars have been evaluated the quality of consolidated cultivated land synthetically from several aspects,such as soil fertility,soil environmental quality,and farmland infrastructure conditions. Specifically,most of the evaluations are static,and indicators are different. Besides,the quality of consolidated cultivated land is generally low,and it lacks systematic research on technologies for improving quality of cultivated land consolidated from coal mining subsided land. It is concluded that future researches should focus on establishing scientific and feasible evaluation system to realize comparison of quality change in the dynamic course of " undisturbed-subsided-consolidated" cultivated land in coal mining areas,as well as technologies for improving quality of cultivated land consolidated from coal mining subsided land.
