Subpixel location of discrete target images in close-range camera calibration: a novel approach

R. Anchini; J. A. Beraldin; C. Liguori

doi:10.1117/12.704224

29 January 2007 Subpixel location of discrete target images in close-range camera calibration: a novel approach

R. Anchini, J. A. Beraldin, C. Liguori

Proceedings Volume 6491, Videometrics IX; 649110 (2007) https://doi.org/10.1117/12.704224
Event: Electronic Imaging 2007, 2007, San Jose, CA, United States

Abstract

A novel approach is presented for the location of discrete targets images with subpixel accuracy. It can be adopted as first stage of any method that uses planar and no-planar grids with circular, square or cross shaped targets in order to calibrate close range cameras. The approach has been performed on several calibration sessions each of them followed by the three-dimensional reconstruction of a reference object that was previously measured through a coordinate measuring machine. The performance of the proposed approach has been expressed in terms of deviation between the reference coordinates and the corresponding ones provided by triangulation. The results obtained have also been compared with those achieved through ShapeCapture^TM, a software widely used in photogrammetry for camera calibration and 3D model reconstruction from images.

Citation Download Citation

R. Anchini, J. A. Beraldin, and C. Liguori "Subpixel location of discrete target images in close-range camera calibration: a novel approach", Proc. SPIE 6491, Videometrics IX, 649110 (29 January 2007); https://doi.org/10.1117/12.704224

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