union of spheres
volumetric model of an image. The technique requires little preprocessing and is not labour-intensive. It allows the user a reasonable degree of control of the matching process. Our method easily facilitates intuitive manual specification of features where desired. The results of our tests are very positive. The problems encountered in using our algorithm are largely predictable and suggest definite directions for future work.
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Tam, R., Fournier, A. Image interpolation using unions of spheres. The Visual Computer 14, 401–414 (1998). https://doi.org/10.1007/s003710050151
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DOI: https://doi.org/10.1007/s003710050151