live-wire segmentation algorithm is an interactive tool for efficient,accurate and reproducible boundary extraction which requires minimal user *** the traditional live-wire algorithm is sensitive to noise and ineffic...
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ISBN:
(纸本)9781538629185
live-wire segmentation algorithm is an interactive tool for efficient,accurate and reproducible boundary extraction which requires minimal user *** the traditional live-wire algorithm is sensitive to noise and inefficient to distinguish between strong and weak edges in the *** overcome the two drawbacks,this paper proposes an improved live-wire algorithm,its cost function is redefined:(1) change the Laplace operator into Canny and Sobel operators to construct the multiple cost terms,differences between Canny and Sobel operators allow them to contribute to the total cost calculation without redundant information;(2) redefine the gradient magnitude function of the cost function as nonlinear weighting edge gradient,the nonlinear weighting procedure can solve the undistinguished edge problem very *** are conducted on simulation and real image of the *** experimental results prove that the proposed algorithm is really of good performance in the two drawbacks.
To accurately segment putamen with fuzzy edges of basal ganglia region in brain Magnetic Resonance (MR) images, a shortest path based interactive segmentation method is proposed in this paper. Considering anatomical f...
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ISBN:
(纸本)9781479959877
To accurately segment putamen with fuzzy edges of basal ganglia region in brain Magnetic Resonance (MR) images, a shortest path based interactive segmentation method is proposed in this paper. Considering anatomical features of putamen, a cost function is designed by using weight coefficients in sub-regions and sub-orientations, and the shortest path search is restrained in a region, so that the fuzzy edges of putamen can be identified effectively. The proposed method solves the problem of live-wire, which is easy to be attracted by the edge of claustrum in detecting edge of putamen. A great deal of experiments demonstrates that proposed method can realize fast segmentation with accuracy and stability for putamen.
An improved live-wire algorithm is presented for interactive weak edge detection and extraction. In comparison with live-wire algorithm, the proposed one, with the same complexity as the original one, greatly improves...
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ISBN:
(纸本)0819451819
An improved live-wire algorithm is presented for interactive weak edge detection and extraction. In comparison with live-wire algorithm, the proposed one, with the same complexity as the original one, greatly improves its performance in edge detection of region of interest (ROI). Meanwhile, the modified algorithm overcomes the following drawbacks of the traditional one: (1) rather sensitive to noise, (2) inefficient to distinguish between the strong and the weak edges, (3) inapplicable to detect sharp edges. The experimental results illustrate that the proposed algorithm is really of good performance over the traditional one in the three aspects.
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