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Proceedings Paper

Method for intensity correction in CR mosaic by combined nonlinear and linear transformations
Author(s): Guo-Qing Wei; JianZhong Qian; Helmuth F. Schramm; Carol L. Novak
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Paper Abstract

In this paper, we present a method to correct for intensity artifacts in mosaic composition of Computed Radiography (CR) images. The white band artifacts not only distort diagnostic information, but also cause visual disturbances in the examination by physicians. We propose a hybrid method to enhance the image intensity and to correct the brightness differences. A nonlinear transformation method is presented for enhancement, whereas a linear regression method is utilized to compensate for the intensity differences between the white band and normal exposure regions. A knowledge-based method is proposed which can autonomously decide whether the nonlinear enhancement step needs to be bypassed, since in some cases over-enhancement may result from the correction algorithm. Experimental results with different images are presented to show the effectiveness of the proposed method.

Paper Details

Date Published: 15 May 2003
PDF: 7 pages
Proc. SPIE 5032, Medical Imaging 2003: Image Processing, (15 May 2003); doi: 10.1117/12.480830
Show Author Affiliations
Guo-Qing Wei, Siemens Corporate Research, Inc. (United States)
JianZhong Qian, Siemens Corporate Research, Inc. (United States)
Helmuth F. Schramm, Siemens AG (Germany)
Carol L. Novak, Siemens Corporate Research, Inc. (United States)


Published in SPIE Proceedings Vol. 5032:
Medical Imaging 2003: Image Processing
Milan Sonka; J. Michael Fitzpatrick, Editor(s)

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