In the past, a variety of interpolation approaches have been proposed for medical images. The shape-based interpolation is a well-known and most commonly used method that can be implemented efficiently and achieve reasonable results. In this chapter, the morphology-based interpolation is first introduced and it can solve drawbacks in the shape-based interpolation method. Next, a powerful feature-guided image interpolation is presented. This method automatically finds feature-line segments and integrates image-warping technique to interpolate shapes. In comparison with the shape-based and morphology-based methods, the feature-guided method can manage more general image cases and generate better shape interpolation.
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