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Geometric Calibration and Accuracy Evaluation of Smartphone Camera  

Kim, Jin-Soo ((주)ZEN21)
Jin, Cheong-Gil (부경대학교 공간정보시스템공학과)
Lee, Seong-Kyu (부경대학교 공간정보시스템공학과)
Lee, Sun-Gu (한국항공우주연구원 위성정보연구소 영상활용기술팀)
Choi, Chul-Uong (부경대학교 공간정보시스템공학과)
Publication Information
Journal of Korean Society for Geospatial Information Science / v.19, no.3, 2011 , pp. 115-125 More about this Journal
Abstract
The smartphones which have been recently are embedded with high resolution quality camera, assisted GPS, accelerometer, gyroscope and various sensors including magnetometer sensor that could be directly used for measurement. This study aims to suggest the possible application of smartphone camera providing high resolution images in terms of photogrammetry by calibrating it and assessing its accuracy. First of all, prior to the accuracy assessment of smartphone camera, camera calibration was conducted to correct lens distortion of each camera and the accuracy of image coordinates and object coordinates calculated by bundle adjustment during this procedure was analyzed. Also regarding three-dimensional positioning, result analysis depending on considering lens distortion coefficients was conducted, and finally relative accuracy of smartphone camera on metric camera was assessed. The result showed that in terms of distortion correction of smartphone camera, also higher order symmetric radial lens distortion coefficients should be considered, and three dimensional position determined by smartphone images was a little difference from that by metric camera. Therefore it is expected that smartphone images have huge possibility to be used for photogrammetry.
Keywords
Smartphone; Camera Calibration; Accuracy; Symmetric Radial Lens Distortion;
Citations & Related Records
Times Cited By KSCI : 6  (Citation Analysis)
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