De Villiers, JWilson, FNicolls, F2011-12-122011-12-122011-11De Villiers, J, Wilson, F, Nicolls, F. 2011. Effects of lens distortion calibration patterns on the accuracy of monocular 3D measurements. 22nd Annual International Symposium of the Pattern Recognition Association of South Africa (PRASA), Emerald Casino and Resort, Vanderbijlpark, South Africa, 22-25 November 2011http://hdl.handle.net/10204/538822nd Annual International Symposium of the Pattern Recognition Association of South Africa (PRASA), Emerald Casino and Resort, Vanderbijlpark, South Africa, 22-25 November 2011A variety of lens distortion modelling techniques exist. Since they make use of different calibration metrics it is difficult to select one over the others. This work aims to compare lens distortion modelling techniques and calibration patterns in a unified and objective manner. A common image dataset is captured along with physical measurements and is used to quantify the photogrammetric accuracy of the different calibration techniques. Multiple calibration patterns and sizes are tested and compared to results obtained with industry standard calibration methods. Several sub-pixel accurate methods of finding calibration points in images are evaluated. Improvements of 20% over the method used in OpenCV are consistently obtained. This work opens up the possibility for improved distortion characterisation in the scientific community.enLens distortion patternsLens distortion calibration patternsLens distortionPattern recognitionCalibration patternsModelling techniquesMonocular 3D measurementsPattern recognition associationPRASA 2011Effects of lens distortion calibration patterns on the accuracy of monocular 3D measurementsConference PresentationDe Villiers, J., Wilson, F., & Nicolls, F. (2011). Effects of lens distortion calibration patterns on the accuracy of monocular 3D measurements. PRASA 2011. http://hdl.handle.net/10204/5388De Villiers, J, F Wilson, and F Nicolls. "Effects of lens distortion calibration patterns on the accuracy of monocular 3D measurements." (2011): http://hdl.handle.net/10204/5388De Villiers J, Wilson F, Nicolls F, Effects of lens distortion calibration patterns on the accuracy of monocular 3D measurements; PRASA 2011; 2011. http://hdl.handle.net/10204/5388 .TY - Conference Presentation AU - De Villiers, J AU - Wilson, F AU - Nicolls, F AB - A variety of lens distortion modelling techniques exist. Since they make use of different calibration metrics it is difficult to select one over the others. This work aims to compare lens distortion modelling techniques and calibration patterns in a unified and objective manner. A common image dataset is captured along with physical measurements and is used to quantify the photogrammetric accuracy of the different calibration techniques. Multiple calibration patterns and sizes are tested and compared to results obtained with industry standard calibration methods. Several sub-pixel accurate methods of finding calibration points in images are evaluated. Improvements of 20% over the method used in OpenCV are consistently obtained. This work opens up the possibility for improved distortion characterisation in the scientific community. DA - 2011-11 DB - ResearchSpace DP - CSIR KW - Lens distortion patterns KW - Lens distortion calibration patterns KW - Lens distortion KW - Pattern recognition KW - Calibration patterns KW - Modelling techniques KW - Monocular 3D measurements KW - Pattern recognition association KW - PRASA 2011 LK - https://researchspace.csir.co.za PY - 2011 T1 - Effects of lens distortion calibration patterns on the accuracy of monocular 3D measurements TI - Effects of lens distortion calibration patterns on the accuracy of monocular 3D measurements UR - http://hdl.handle.net/10204/5388 ER -