We present a novel approach to shape-based interpolation of gray-level volume data. In contrast to the segmentation-based techniques our method directly processes the scalar volume requiring no
user interaction. The key idea is to perform the interpolation in the directions given by analysis of the eigensystem of the
structure tensor. Our method processes a 256 x 256 slice within a couple of seconds yielding satisfactory results. We give a quantitative and a visual comparison to the linear inter-slice interpolation. Analysis of the results lead us
to the conclusion that our technique has a strong potential to compete with well-established shape-based
interpolation algorithms.
