Research on target detection of oblique photography right angle image control point based on space three algorithm

Cheng Jiang; Xinghua Zhang; Heyan Huang; Liwei Wang; Hongyi Liu

doi:10.1117/12.2644577

9 September 2022 Research on target detection of oblique photography right angle image control point based on space three algorithm

Cheng Jiang, Xinghua Zhang, Heyan Huang, Liwei Wang, Hongyi Liu

Author Affiliations +

Proceedings Volume 12328, Second International Conference on Optics and Image Processing (ICOIP 2022); 123280X (2022) https://doi.org/10.1117/12.2644577
Event: Second International Conference on Optics and Image Processing (ICOIP 2022), 2022, Taian, China

Abstract

Aiming at the problems of low efficiency and large error of artificial puncture points for accurate correction of data in aerial photogrammetry hollow three-encryption, this paper proposes a right-angle image control point target detection method based on LSD (Line Segment Detection) algorithm. In this method, the color information of the image is first enhanced by the Retinex algorithm; then the image is filtered bilaterally, which can well preserve the edge information while removing noise; then the LSD algorithm is used to extract the line segments, and the line segments are combined with the least squares fitting; The outermost right-angle edge is filtered out by angle, distance and length information, and finally the right-angle image control point is obtained by intersecting. In the case of complex background and target distortion, it can still maintain a high accuracy, and the positioning accuracy is significantly better than that of artificial punctures. Compared with the Radon and PPHT algorithms, the detection accuracy of the image control point group of the algorithm in this paper is significantly improved, indicating that its detection accuracy is less affected by the shooting angle.

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Cheng Jiang, Xinghua Zhang, Heyan Huang, Liwei Wang, and Hongyi Liu "Research on target detection of oblique photography right angle image control point based on space three algorithm", Proc. SPIE 12328, Second International Conference on Optics and Image Processing (ICOIP 2022), 123280X (9 September 2022); https://doi.org/10.1117/12.2644577

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KEYWORDS

3D modeling

Image segmentation

Detection and tracking algorithms

Image processing algorithms and systems

Photography

3D image processing

Image encryption

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