Acta Geodaetica et Cartographica Sinica ›› 2017, Vol. 46 ›› Issue (7): 900-909.doi: 10.11947/j.AGCS.2017.20160436

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UAV Image Registration Algorithm Using Color Invariant and AKAZE Feature

LIANG Huanqing1, XIE Yi1, FU Sizhou2   

  1. 1. Nanning Land Surveying, Mapping and Geoinformation Center, Nanning 530021, China;
    2. Guangxi YeHeng Surveying Design Co. Ltd., Nanning 530021, China
  • Received:2016-09-02 Revised:2017-06-12 Online:2017-07-20 Published:2017-07-25

Abstract: Image matching based on feature was one of practical methods in UAV image matching. Since the conventional methods of image registration mainly used gray image as input that it could not take color features into account to distinguish the identical point. To address this problem, this paper designed a matching algorithm combined color invariant with AKAZE feature, which overcame the shortcoming of ignoring color information in traditional UAV image matching. Then gray level transformation was utilized to reduce the number of feature points and remain its reliability. Experimental results demonstrate that the proposed method can find the identical point accurately and enhance the efficiency.

Key words: UAV image, color invariant, AKAZE feature extraction algorithm, gray level transformation, image matching

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