Minimization of Region-Scalable Fitting Energy for
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Intensity inhomogeneities often occur in real-world images and may cause considerable difficulties in image segmentation.
In order to overcome the difficulties caused by intensity inhomogeneities, we propose a region-based active contour model that draws upon intensity information in local regions at a controllable scale. A data fitting energy is defined in terms of a contour and two fitting functions that locally approximate the image intensities on the two sides of the contour.