Practical target location and accuracy indicator in digital close range photogrammetry using consumer grade cameras

Gentaro Moriya; Hirofumi Chikatsu

doi:10.1117/12.887971

21 June 2011 Practical target location and accuracy indicator in digital close range photogrammetry using consumer grade cameras

Gentaro Moriya, Hirofumi Chikatsu

Author Affiliations +

Proceedings Volume 8085, Videometrics, Range Imaging, and Applications XI; 808503 (2011) https://doi.org/10.1117/12.887971
Event: SPIE Optical Metrology, 2011, Munich, Germany

Abstract

Recently, pixel numbers and functions of consumer grade digital camera are amazingly increasing by modern semiconductor and digital technology, and there are many low-priced consumer grade digital cameras which have more than 10 mega pixels on the market in Japan. In these circumstances, digital photogrammetry using consumer grade cameras is enormously expected in various application fields. There is a large body of literature on calibration of consumer grade digital cameras and circular target location. Target location with subpixel accuracy had been investigated as a star tracker issue, and many target location algorithms have been carried out. It is widely accepted that the least squares models with ellipse fitting is the most accurate algorithm. However, there are still problems for efficient digital close range photogrammetry. These problems are reconfirmation of the target location algorithms with subpixel accuracy for consumer grade digital cameras, relationship between number of edge points along target boundary and accuracy, and an indicator for estimating the accuracy of normal digital close range photogrammetry using consumer grade cameras. With this motive, an empirical testing of several algorithms for target location with subpixel accuracy and an indicator for estimating the accuracy are investigated in this paper using real data which were acquired indoors using 7 consumer grade digital cameras which have 7.2 mega pixels to 14.7 mega pixels.

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Gentaro Moriya and Hirofumi Chikatsu "Practical target location and accuracy indicator in digital close range photogrammetry using consumer grade cameras", Proc. SPIE 8085, Videometrics, Range Imaging, and Applications XI, 808503 (21 June 2011); https://doi.org/10.1117/12.887971

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KEYWORDS

Cameras

Photogrammetry

Digital photography

Stars

Detection and tracking algorithms

Target recognition

Digital cameras

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