| On Removing Interpolation and Resampling Artifacts in Rigid Image Registration. | |
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MedLine Citation:
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PMID: 23076044 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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We show that image registration using conventional interpolation and summation approximations of continuous integrals can generally fail due to resampling artifacts. These artifacts negatively affect the accuracy of registration by producing local optima, altering the gradient, shifting the global optimum, and making rigid registration asymmetric. In this work, after an extensive literature review, we demonstrate the causes of the artifacts by comparing inclusion and avoidance of resampling analytically. We show the sum-of-squared-differences cost function formulated as an integral to be more accurate compared to its traditional sum form in a simple case of image registration. We then discuss aliasing that occurs in rotation, which is due to the fact that an image represented in the Cartesian grid is sampled with different rates in different directions, and propose the use of oscillatory isotropic interpolation kernels that allow better recovery of true global optima by overcoming this type of aliasing. Through our experiments on brain, fingerprint, and white noise images, we illustrate the superior performance of the integral registration cost function in both Cartesian and spherical coordinates, and also validate the introduced radial interpolation kernel by demonstrating the improvement in registration. |
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Authors:
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I Aganj; B Yeo; M Sabuncu; B Fischl |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2012-10-11 |
Journal Detail:
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Title: IEEE transactions on image processing : a publication of the IEEE Signal Processing Society Volume: - ISSN: 1941-0042 ISO Abbreviation: IEEE Trans Image Process Publication Date: 2012 Oct |
Date Detail:
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Created Date: 2012-10-18 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9886191 Medline TA: IEEE Trans Image Process Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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