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| Title | Isophote estimation by cubic-spline interpolation |
| Publication Type | Conference Paper |
| Year of Publication | 2002 |
| Authors | Wang, Q., R. Ward, and H. Shi |
| Conference Name | Image Processing. 2002. Proceedings. 2002 International Conference on |
| Pagination | III-401 - III-404 vol.3 |
| Keywords | cubic function, cubic-spline interpolation, equi-intensity contours, image interpolation, image sampling, interpolation, isophote estimation, sparsely sampled digital images, splines (mathematics), zigzag effects |
| Abstract | We apply the cubic-spline interpolation to estimate isophotes from sparsely sampled digital images. For any non-pixel, we interpolate it by cubic spline, and by solving the yielding cubic function analytically, we find positions of pixels with the same intensity value. Experiment results are given and discussed. This spreads some important light on the nature of interpolation in images and why the well-known zigzag effects are obtained when images are interpolated. |
| URL | http://dx.doi.org/10.1109/ICIP.2002.1038990 |
| DOI | 10.1109/ICIP.2002.1038990 |