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Interactive polygons in region-based deformable contours for medical images
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Distance regularized level set evolution and its application to image segmentation
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Active contour model for simultaneous MR image segmentation and denoising
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Adaptive diffusion flow active contours for image segmentation
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A novel multi-scale local region model for segmenting image with intensity inhomogeneity
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Fully automatic segmentation based on localizing active contour method
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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. This energy is then incorporated into a variational level set formulation with a level set regularization term, from which a curve evolution equation is derived for energy minimization. Due to a kernel function in the data fitting term, intensity information in local regions is extracted to guide the motion of the contour, which thereby enables our model to cope with intensity inhomogeneity. In addition, the regularity of the level set function is intrinsically preserved by the level set regularization term to ensure accurate computation and avoids expensive reinitialization of the evolving level set function. Experimental results for synthetic and real images show desirable performances of our method.