关键词: 立体匹配, 密集匹配, 航空影像, 卷积神经元网络, 深度学习

Abstract: This work studied that the application of deep learning based stereo methods in aerial remote sensing images, including its performance evaluation, the comparison with classical methods and generalization ability estimation.Three convolution neural networks are applied, MC-CNN(matching cost convolutional neural network), GC-Net(geometry and context network) and DispNet(disparity estimation network), on aerial stereo image pairs. The results are compared with SGM (semi-global matching) and a commercial software SURE. Secondly, the generalization ability of the MC-CNN and GC-Net are evaluated with models pretrained on other datasets. Finally, fine tuning on a small number of target training data with pretrained models are compared to direct training. Three sets of aerial images and two open-source street data sets are used for test. Experiments show that:firstly, deep learning methods perform slightly better than traditional methods; secondly, both GC-Net and MC-CNN have demonstrated good generalization ability, and can get satisfactory 3PE (3-pixel-error) results on aerial images using a model pretrained on available stereo benchmarks; thirdly, when the training samples in target dataset are insufficient, the strategy of fine-tuning on a pretrained model can improve the effect of direct training.

Key words: stereo matching, dense matching, aerial images, convolutional neural network, deep learning