Nonrigid Image Registration for Low-Altitude SUAV Images With Large Viewpoint Changes

作者：Zhang, Su; Yang, Kun^*; Yang, Yang^*; Luo, Yi

来源：IEEE Geoscience and Remote Sensing Letters, 2018, 15(4): 592-596.

DOI：10.1109/LGRS.2018.2796136

• Feature complementation
• global-local structure constraint
• low-altitude SUAV photography
• outlier rejection
• small unmanned aerial vehicles (SUAVs)

Low-altitude aerial photography using small unmanned aerial vehicles (SUAVs) with large viewpoint changes causes nonrigid distortions and low overlap ratios. We present a nonrigid feature-based low-altitude SUAV image-registration method. The key idea of our method is to maintain a high matching ratio on inliers while taking advantage of outliers for varying the warping grids. Thus, accurate image transformation over the overlapping areas as well as a good approximation of the real transformation over the nonoverlapping areas can be obtained. Experiments on feature matching and image registration are performed using 42 pairs of SUAV images. Our method exhibited a favorable performance as compared with four state-of-the-art methods, even with up to 80% outliers.

• 出版日期2018-4
• 单位云南师范大学