Title :
Extracting distorted grid points for compensation of lens radial nonlinearities
Author :
Nowakowski, Artur ; Skarbek, Wladyslaw
Author_Institution :
Inst. of Radioelectron., Warsaw Univ. of Technol., Warsaw, Poland
Abstract :
A novel method for extracting distorted grid points for compensation of lens radial nonlinearities is presented. It is based on identification of homographic transformation using single image of dense planar chessboard pattern. Undistorted grid image is determined from the central part of the grid and used to find the radial distortion model by linear least square method (LSM). The model is used for dense compensation by bilinear interpolation.
Keywords :
compensation; image processing; interpolation; least squares approximations; lenses; optical distortion; bilinear interpolation; dense compensation; dense planar chessboard pattern; extracting distorted grid points; homographic transformation identification; lens radial nonlinearities; linear least square method; radial distortion model; single image; undistorted grid image; Accuracy; Calibration; Cameras; Estimation; Lenses; Optical distortion; Transmission line matrix methods;
Conference_Titel :
Signal Processing Conference, 2007 15th European
Conference_Location :
Poznan
Print_ISBN :
978-839-2134-04-6
