TITLE:
Real-Time Mosaic Method of Aerial Video Based on Two-Stage Key Frame Selection Method
AUTHORS:
Minwen Yuan, Yonghong Long, Xin Li
KEYWORDS:
UAV Aerial Video, Image Stiching, Key Frame Selection, Overlapping Rate, Remap Error
JOURNAL NAME:
Open Journal of Applied Sciences,
Vol.14 No.4,
April
24,
2024
ABSTRACT: A two-stage automatic key frame selection method is proposed to enhance stitching speed and quality for UAV aerial videos. In the first stage, to reduce redundancy, the overlapping rate of the UAV aerial video sequence within the sampling period is calculated. Lagrange interpolation is used to fit the overlapping rate curve of the sequence. An empirical threshold for the overlapping rate is then applied to filter candidate key frames from the sequence. In the second stage, the principle of minimizing remapping spots is used to dynamically adjust and determine the final key frame close to the candidate key frames. Comparative experiments show that the proposed method significantly improves stitching speed and accuracy by more than 40%.