Acta Geodaetica et Cartographica Sinica ›› 2021, Vol. 50 ›› Issue (2): 189-202.doi: 10.11947/j.AGCS.2021.20200048

• Photogrammetry and Remote Sensing • Previous Articles     Next Articles

Deep learning algorithm for feature matching of cross modality remote sensing images

LAN Chaozhen1, LU Wanjie1, YU Junming2, XU Qing1   

  1. 1. Institute of Geospatial Information, Information Engineering University, Zhengzhou 450001, China;
    2. China Electronic Technology Group Corporation 27 th Research Institute, Zhengzhou 450047, China
  • Received:2020-02-17 Revised:2020-12-14 Published:2021-03-03
  • Supported by:
    The National Key Research and Development Project(No. 2017YFC1200305);The National Natural Science Foundation of China (Nos. 41876105;41371436)

Abstract: Focusing on the problem of difficulty in matching due to the differences in imaging modality, time phases, and resolutions of cross modality remote sensing images, a new deep learning feature matching method named CMM-Net is proposed. First, a convolutional neural network is used to extract high-dimensional feature maps of the cross modality remote sensing images. The key points are selected according to the conditions that both the channel maximum and local maximum are met, and the 512-dimensional descriptors in corresponding location are extracted on the feature map to complete the feature extraction. In the matching stage, after completing the fast-nearest neighbor searching, in order to solve the problem of lots of mismatched points, a purification algorithm with dynamic adaptive Euclidean distance and RANSAC constraints is proposed to ensure that the mismatches are effectively eliminated while retaining the correct matches. The algorithm was tested using multiple sets of cross modality remote sensing images and compared with other algorithms. The results show that the proposed algorithm has the ability to extract similar scale invariant features in cross modality images, and has strong adaptability and robustness.

Key words: deep learning, image matching, cross modality image, convolution neural network, satellite image

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