| 2-D piecewise linear transformation |
| Image Registration and Fusion Systems |
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Given a set of corresponding landmarks in two images, the landmarks in one of the images is triangulated and from the
correspondence between the landmarks, corresponding triangles in the images are determined. Then, a linear transformation is
determined to map a triangular region in one image to the corresponding triangular region in another image. Therefore, unlike
surface spline, this transformation registers only regions inside the convex hulls of the landmarks in the images, leaving areas
outside the convex hulls.
A triangulation example is shown below. When images have local geometric differences, this transformation is a better model to
register the images compared to surface spline.
correspondence between the landmarks, corresponding triangles in the images are determined. Then, a linear transformation is
determined to map a triangular region in one image to the corresponding triangular region in another image. Therefore, unlike
surface spline, this transformation registers only regions inside the convex hulls of the landmarks in the images, leaving areas
outside the convex hulls.
A triangulation example is shown below. When images have local geometric differences, this transformation is a better model to
register the images compared to surface spline.
| A triangulation example. |
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