基于深度学习模型的遥感图像分割方法

利用遥感图像快速准确地检测地物信息是当前的研究热点。针对遥感图像地表物的传统人工目视解译分割方法效率低下和现有基于深度学习的遥感图像分割算法在复杂场景下准确率不高、背景噪声多的问题,提出一种基于改进的U-net架构与全连接条件随机场的图像分割算法。首先,融合VGG16和U-net构建新的网络模型,以有效提取具有高背景复杂度的遥感图像特征;然后,通过选取适当的激活函数和卷积方式,在提高图像分割准确率的同时显著降低模型预测时间;最后,在保证分割精度的基础上,使用全连接条件随机场进一步优化分割结果,以获得更加细致的分割边缘。在ISPRS提供的标准数据集Potsdam上进行的仿真测试表明,相较于U-net,所提算法的准确率、召回率和均交并比(MIoU)分别提升了15.06个百分点、29.11个百分点和0.3662,平均绝对误差(MAE)降低了0.02892。实验结果验证了该算法具备有效性和鲁棒性,是一种有效的遥感图像地表物提取算法。

Remote sensing image segmentation method based on deep learning model

To detect surface object information quickly and accurately by using remote sensing images is a current research hot spot. In order to solve the problems of inefficiency of the traditional manual visual interpretation segmentation method as well as the low accuracy and a lot of background noise of the existing remote sensing image segmentation based on deep learning in complex scenes, an image segmentation algorithm based on improved U-net network architecture and fully connected conditional random field was proposed. Firstly, a new network model was constructed by integrating VGG16 and U-net to effectively extract the features of remote sensing images with highly complex background. Then, by selecting the appropriate activation function and convolution method, the image segmentation accuracy was improved while the model prediction time was significantly reduced. Finally, on the basis of guaranteeing the segmentation accuracy, the segmentation result was further improved by using fully connected conditional random field. The simulation test on the standard dataset Potsdam provided by ISPRS showed that the accuracy, recall and the Mean Intersection over Union (MIoU) of the proposed algorithm were increased by 15.06 percentage points, 29.11 percentage points and 0.3662 respectively, and the Mean Absolute Error (MAE) of the algorithm was reduced by 0.02892 compared with those of U-net. Experimental results verify that the proposed algorithm is an effective and robust algorithm for extracting surface objects from remote sensing images.