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摘要
Ring artifacts are a common problem in computed tomography, positron emission tomography, magnetic resonance imaging, and synchrotron radiation images. Before further processing the images such as segmentation and quantification, these artifacts have to be removed or suppressed. Otherwise, they may introduce additional errors for the segmentation and subsequent analysis. This paper proposes an improved ring artifact removal method based on biorthogonal wavelet transform, one-dimensional fast Fourier transform, and Gaussian damping, which is implemented on general-purpose computing on graphics processing unit with compute unified device architecture. The experimental results show that the proposed algorithms can be speed up several hundred times compared with the previous algorithms on CPU. The significant performance improvement makes the algorithms much more practical in processing large volume of images in real time.
- 出版日期2014-12-25
- 单位浙江工商大学; CSIRO
