Deep Learning-Based UAV Aerial Triangulation without Image Control Points

• URL: http://arxiv.org/abs/2301.02869v1
• Date: Sat, 7 Jan 2023 15:01:38 GMT
• Title: Deep Learning-Based UAV Aerial Triangulation without Image Control Points
• Authors: Jiageng Zhong, Ming Li, Jiangying Qin, Hanqi Zhang
• Abstract summary: How to realize the large-scale mapping of UAV image-free control supported by POS faces many technical problems. Deep learning has surpassed the performance of traditional handcrafted features in many aspects. This paper proposes a new drone image registration method based on deep learning image features.
• Score: 6.335630432207172
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: The emerging drone aerial survey has the advantages of low cost, high efficiency, and flexible use. However, UAVs are often equipped with cheap POS systems and non-measurement cameras, and their flight attitudes are easily affected. How to realize the large-scale mapping of UAV image-free control supported by POS faces many technical problems. The most basic and important core technology is how to accurately realize the absolute orientation of images through advanced aerial triangulation technology. In traditional aerial triangulation, image matching algorithms are constrained to varying degrees by preset prior knowledge. In recent years, deep learning has developed rapidly in the field of photogrammetric computer vision. It has surpassed the performance of traditional handcrafted features in many aspects. It has shown stronger stability in image-based navigation and positioning tasks, especially it has better resistance to unfavorable factors such as blur, illumination changes, and geometric distortion. Based on the introduction of the key technologies of aerial triangulation without image control points, this paper proposes a new drone image registration method based on deep learning image features to solve the problem of high mismatch rate in traditional methods. It adopts SuperPoint as the feature detector, uses the superior generalization performance of CNN to extract precise feature points from the UAV image, thereby achieving high-precision aerial triangulation. Experimental results show that under the same pre-processing and post-processing conditions, compared with the traditional method based on the SIFT algorithm, this method achieves suitable precision more efficiently, which can meet the requirements of UAV aerial triangulation without image control points in large-scale surveys.

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