Noise-adaptive bilateral filtering of projections for Computed Tomography
Gabiger-Rose A, Rose R, Kube M, Schmitt P, Weigel R (2011)
Publication Type: Conference contribution
Publication year: 2011
Publisher: Society of High Performance Computational Imaging (SHPCI)
Pages Range: 306-309
Conference Proceedings Title: 11th International Meeting on Fully Three-Dimensional Image Reconstruction in Radiology and Nuclear Medicine
Event location: Potsdam, Germany
URI: http://www.fully3d.org/2011/Fully3D2011Proceedings.pdf
Abstract
In this work, the image quality enhancement of CT images via filtering of noise in the projections is shown. For denoising, a noise-adaptively adjustable bilateral filter is exerted. The application area of the presented work is nondestructive testing in the industry. Bilateral filtering incorporates the combination of domain and range filtering. The domain filter averages the nearby pixel values and acts thereby as a low-pass filter. The range filter stands for the nonlinear component and plays an important part in edge preserving. These filter components both can be adjusted by corresponding parameters. In this paper, the way is presented how the parameter for the adjustment of the nonlinear component can be derived from the standard deviation of noise. This approach allows to increase the PSNR_dB while retaining the structural similarity MSSIM at a high level. Using the proposed method for the calculation of the range filter parameter an automatic noise-adaptive tuning of the noise filter is possible. Moreover filter tuning is effective for any noise level. Besides the increase of the PSNR_dB and of the MSSIM it is demonstrated, that owing to the bilateral filtering of projections the detectability of the low contrast details in CT images can be improved. As long as the details can be distinguished from noise, it is possible to enhance the contrast resolution of these details due to the bilateral filtering of projections using our proposed filter adjustment.
Authors with CRIS profile
Anna Gabiger-Rose
Lehrstuhl für Technische Elektronik
Richard Rose
Lehrstuhl für Technische Elektronik
Robert Weigel
Lehrstuhl für Technische Elektronik
Involved external institutions
Germany (DE)How to cite
APA:
Gabiger-Rose, A., Rose, R., Kube, M., Schmitt, P., & Weigel, R. (2011). Noise-adaptive bilateral filtering of projections for Computed Tomography. In 11th International Meeting on Fully Three-Dimensional Image Reconstruction in Radiology and Nuclear Medicine (pp. 306-309). Potsdam, Germany: Society of High Performance Computational Imaging (SHPCI).
MLA:
Gabiger-Rose, Anna, et al. "Noise-adaptive bilateral filtering of projections for Computed Tomography." Proceedings of the 11th International Meeting on Fully Three-Dimensional Image Reconstruction in Radiology and Nuclear Medicine, Potsdam, Germany Society of High Performance Computational Imaging (SHPCI), 2011. 306-309.
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