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access icon free Reference-omitted affine soft correspondence algorithm

In this study, an affine registration algorithm with reference-omitted scheme and soft correspondence is proposed. It is an iterative method with two-step matching process at each iteration, named as forward matching and backward matching. Due to the introduction of backward matching, two sets of points are alternately to be reference set, such that the selection of reference set is omitted. Failure caused by different reference sets can be corrected with the reference-omitted scheme, and even there is obvious difference in scale. Additionally, soft correspondence is applied to avoid estimating the initial transformations. The simulation and real experimental results show that the proposed method substantially outperforms the current affine registration methods, especially when the scale difference between two sets of points is obvious or there are outliers in one set.

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http://iet.metastore.ingenta.com/content/journals/10.1049/iet-ipr.2015.0254
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