Aiming at the rapid identification of rural buildings in complex environments from high-spatialresolution images, an improved Mahalanobis distance colour segmentation method(IMDCSM) is proposed and realised in Red, Gr...Aiming at the rapid identification of rural buildings in complex environments from high-spatialresolution images, an improved Mahalanobis distance colour segmentation method(IMDCSM) is proposed and realised in Red, Green and Blue(RGB) space. Vector sets of a lower discrete degree are obtained by filtering the colour vector sets of the building samples, and a standard ellipsoid equation can be constructed based on these vector sets. The threshold of interested colour range can be flexibly and intuitively selected by changing the shape and size of this ellipsoid. Then, according to the relationship between the location of the image pixel colour vector and the ellipsoid, all building information can be extracted quickly. To verify the effectiveness of the proposed method, unmanned aerial vehicle(UAV) images of two areas in the suburbs of Chengdu city and Deyang city were utilised as experimental data for image segmentation, and the existing colour segmentation method based on the Mahalanobis distance was selected as an indicator to assess the effectiveness of this method. The experimental results demonstrate that the completeness and correctness of this method reached 95% and 83.0%, respectively, values that are higher than those of the Mahalanobis distance colour segmentation method(MDCSM). In general, this method is suitable for the rapid extraction of rural building information, and provides a new threshold selection method for classification.展开更多
为准确、快速地识别高压输电线路关键部件典型小目标故障,提出一种基于图像双分割与HSV空间颜色和HELM3纹理融合特征的高压输电线路典型小目标故障识别方法。该方法以航拍高压输电线路关键部件故障图像为原始数据,其中包括线夹偏移、绝...为准确、快速地识别高压输电线路关键部件典型小目标故障,提出一种基于图像双分割与HSV空间颜色和HELM3纹理融合特征的高压输电线路典型小目标故障识别方法。该方法以航拍高压输电线路关键部件故障图像为原始数据,其中包括线夹偏移、绝缘子破损、引流线松股、链接金具锈蚀、铁塔杂物等典型小目标故障,以双分割后图像为研究对象,提取色度,饱和度,数值(hue,saturation,value,HSV)空间9个颜色特征、3层小波分解高频协方差矩阵与低频低阶矩(high frequency covariance matrix eigenvalues and lowfrequencylowerordermomentsin3-layerwavelet domain,HELM3)的18个不变纹理特征,进行支持向量机(supportvectormachine,SVM)的输电线路典型小目标故障分类识别。试验结果表明:在SVM识别模型下对高压输电线路典型小目标故障进行分类,该文的HSV和HELM3特征融合方法,相比于二者单独进行识别,平均识别率分别提高了10.89%和10.19%,达到92.64%;在不同分类模式下,该文SVM分类器的识别率比贝叶斯分类器、K近邻算法(K-nearest neighbor,KNN)分类器平均识别率提高了至少10个百分点,有明显的识别优势。展开更多
基金supported by National Science and Technology Support Project of the 12th Five-Year Plan of China (Grant No.2014BAL01B04)Sichuan Provincial Department of Land and Resources Research Project (Grant No.KJ-2018-13)
文摘Aiming at the rapid identification of rural buildings in complex environments from high-spatialresolution images, an improved Mahalanobis distance colour segmentation method(IMDCSM) is proposed and realised in Red, Green and Blue(RGB) space. Vector sets of a lower discrete degree are obtained by filtering the colour vector sets of the building samples, and a standard ellipsoid equation can be constructed based on these vector sets. The threshold of interested colour range can be flexibly and intuitively selected by changing the shape and size of this ellipsoid. Then, according to the relationship between the location of the image pixel colour vector and the ellipsoid, all building information can be extracted quickly. To verify the effectiveness of the proposed method, unmanned aerial vehicle(UAV) images of two areas in the suburbs of Chengdu city and Deyang city were utilised as experimental data for image segmentation, and the existing colour segmentation method based on the Mahalanobis distance was selected as an indicator to assess the effectiveness of this method. The experimental results demonstrate that the completeness and correctness of this method reached 95% and 83.0%, respectively, values that are higher than those of the Mahalanobis distance colour segmentation method(MDCSM). In general, this method is suitable for the rapid extraction of rural building information, and provides a new threshold selection method for classification.
文摘为准确、快速地识别高压输电线路关键部件典型小目标故障,提出一种基于图像双分割与HSV空间颜色和HELM3纹理融合特征的高压输电线路典型小目标故障识别方法。该方法以航拍高压输电线路关键部件故障图像为原始数据,其中包括线夹偏移、绝缘子破损、引流线松股、链接金具锈蚀、铁塔杂物等典型小目标故障,以双分割后图像为研究对象,提取色度,饱和度,数值(hue,saturation,value,HSV)空间9个颜色特征、3层小波分解高频协方差矩阵与低频低阶矩(high frequency covariance matrix eigenvalues and lowfrequencylowerordermomentsin3-layerwavelet domain,HELM3)的18个不变纹理特征,进行支持向量机(supportvectormachine,SVM)的输电线路典型小目标故障分类识别。试验结果表明:在SVM识别模型下对高压输电线路典型小目标故障进行分类,该文的HSV和HELM3特征融合方法,相比于二者单独进行识别,平均识别率分别提高了10.89%和10.19%,达到92.64%;在不同分类模式下,该文SVM分类器的识别率比贝叶斯分类器、K近邻算法(K-nearest neighbor,KNN)分类器平均识别率提高了至少10个百分点,有明显的识别优势。
