Method for intensity correction in CR mosaic by combined nonlinear and linear transformations

Guo-Qing Wei; JianZhong Qian; Helmuth F. Schramm; Carol L. Novak

doi:10.1117/12.480830

15 May 2003 Method for intensity correction in CR mosaic by combined nonlinear and linear transformations

Guo-Qing Wei, JianZhong Qian, Helmuth F. Schramm, Carol L. Novak

Proceedings Volume 5032, Medical Imaging 2003: Image Processing; (2003) https://doi.org/10.1117/12.480830
Event: Medical Imaging 2003, 2003, San Diego, California, United States

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.

Citation Download Citation

Guo-Qing Wei, JianZhong Qian, Helmuth F. Schramm, and Carol L. Novak "Method for intensity correction in CR mosaic by combined nonlinear and linear transformations", Proc. SPIE 5032, Medical Imaging 2003: Image Processing, (15 May 2003); https://doi.org/10.1117/12.480830

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