Title: A New Sub-Pixel Detector for X-Corners in Camera Calibration Targets
Authors: Chen, Dazhi
Zhang, Guangjun
Citation: WSCG '2005: Short Papers: The 13-th International Conference in Central Europe on Computer Graphics, Visualization and Computer Vision 2005 in co-operation with EUROGRAPHICS, p. 97-100.
Issue Date: 2005
Publisher: Václav Skala - UNION Agency
Document type: konferenční příspěvek
URI: http://wscg.zcu.cz/WSCG2005/Papers_2005/Short/!WSCG2005_Short_Proceedings_Final.pdf
ISBN: 80-903100-9-5
Keywords: X-rohy;subpixelová detekce;kalibrace kamery
Keywords in different language: X-corners;sub-pixel detection;camera calibration
Abstract: X-corner patterns are most widely used in camera calibration. In this paper, we propose a new sub-pixel detector for X-corners, which is much simpler than the traditional sub-pixel detection algorithm. In this new algorithm, the pixel position of X-corner is firstly detected by a new operator. Then a second order Taylor polynomial describing the local intensity profile around the corner is educed. The sub-pixel position of X-corner can be determined directly by calculating the saddle point of this intensity profile. Neither preliminary intensity interpolation nor quadratic fitting of the intensity surface is necessary, which greatly reduces the computation load of the detection process. Furthermore, computer simulation results indicate that our new algorithm is slightly more accurate than the traditional algorithm.
Rights: © Václav Skala - UNION Agency
Appears in Collections:WSCG '2005: Short Papers

Files in This Item:
File Description SizeFormat 
Chen.pdfPlný text186,38 kBAdobe PDFView/Open

Please use this identifier to cite or link to this item: http://hdl.handle.net/11025/11219

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.