A Stereo Dual-Channel Dynamic Programming Algorithm for UAV Image Stitching
by
Ming Li 1,2,3
, 
Ruizhi Chen 1,2,*, Weilong Zhang 1,*, Deren Li 1,2, Xuan Liao 1, Lei Wang 1, Yuanjin Pan 1 and Peng Zhang 1
Ming Li 1,2,3, Ruizhi Chen 1,2,*, Weilong Zhang 1,*, Deren Li 1,2, Xuan Liao 1, Lei Wang 1, Yuanjin Pan 1 and Peng Zhang 1
1
State Key Laboratory of Information Engineering in Surveying Mapping and Remote Sensing, Wuhan University, Wuhan 430079, China
2
Collaborative Innovation Center of Geospatial Technology, Wuhan University, Wuhan 430079, China
3
School of Resource and Environmental Science, Wuhan University, Wuhan 430079, China
*
Authors to whom correspondence should be addressed.
Sensors 2017, 17(9), 2060; https://doi.org/10.3390/s17092060
Received: 6 July 2017 / Revised: 28 August 2017 / Accepted: 6 September 2017 / Published: 8 September 2017
(This article belongs to the Special Issue UAV or Drones for Remote Sensing Applications)
Dislocation is one of the major challenges in unmanned aerial vehicle (UAV) image stitching. In this paper, we propose a new algorithm for seamlessly stitching UAV images based on a dynamic programming approach. Our solution consists of two steps: Firstly, an image matching algorithm is used to correct the images so that they are in the same coordinate system. Secondly, a new dynamic programming algorithm is developed based on the concept of a stereo dual-channel energy accumulation. A new energy aggregation and traversal strategy is adopted in our solution, which can find a more optimal seam line for image stitching. Our algorithm overcomes the theoretical limitation of the classical Duplaquet algorithm. Experiments show that the algorithm can effectively solve the dislocation problem in UAV image stitching, especially for the cases in dense urban areas. Our solution is also direction-independent, which has better adaptability and robustness for stitching images.
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Keywords:
UAV image; dual-channel; dynamic programming; seam line; energy function
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MDPI and ACS Style
Li, M.; Chen, R.; Zhang, W.; Li, D.; Liao, X.; Wang, L.; Pan, Y.; Zhang, P. A Stereo Dual-Channel Dynamic Programming Algorithm for UAV Image Stitching. Sensors 2017, 17, 2060.
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