Using resolution pyramids for watershed image segmentation

Authors:
Maria Frucci;Giuliana Ramella;Gabriella Sanniti di Baja
Affiliations:
Institute of Cybernetics "E. Caianiello", Italian National Research Council (CNR), Via Campi Flegrei 34, 80078 Pozzuoli (Naples), Italy;Institute of Cybernetics "E. Caianiello", Italian National Research Council (CNR), Via Campi Flegrei 34, 80078 Pozzuoli (Naples), Italy;Institute of Cybernetics "E. Caianiello", Italian National Research Council (CNR), Via Campi Flegrei 34, 80078 Pozzuoli (Naples), Italy
Venue:
Image and Vision Computing
Year:
2007

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Abstract

In this paper we build a shape preserving resolution pyramid and use it in the framework of image segmentation via watershed transformation. Our method is based on the assumption that the most significant image components perceived at high resolution will also be perceived at lower resolution. Thus, we detect the seeds for the watershed transformation at a low resolution, and use them to distinguish significant and non-significant seeds at any selected higher resolution. In this way, the watershed partition obtained at the selected pyramid level will include only the most significant components, and over-segmentation will be considerably reduced. Segmentations of the image at different scales will be available. Moreover, since the seeds can be detected at different pyramid levels, alternative segmentations of the image at a given resolution can be obtained, each characterized by a different level of detail.