Contour Extraction of Skin Tumors Using Visual Attention and GVF-Snake Model
- 1 College of Life Information & Instrument Engineering, Hangzhou Dianzi University, Hangzhou, China
- 2 School of Automation, Hangzhou Dianzi University, Hangzhou, China
Abstract
Contour extraction of skin tumors accurately is an important task for further feature generation of their borders and sur-faces to early diagnose melanomas. An integrated approach, combining visual attention model and GVF-snake, is pro-posed in the paper to provide a general framework for locating tumor boundaries in case of noise and boundaries with large concavity. For any skin image, the visual attention model is implemented to locate the Region of Interests (ROIs) based on saliency maps. Then an algorithm called GVF-snake is utilized to iteratively drive an initial contour, deriving from the extracted ROIs, towards real boundary of skin tumors by minimizing an energy function. It is shown from ex-periments that the proposed approach exceeds in two aspects compared with other contour-deforming methods: 1) ini-tial contours generated from saliency maps are definitely located at neighboring regions of real boundaries of skin tu-mors to speed up converges of contour deformation and achieve higher accuracy; 2) the method is not sensitive to nois-es on skins and initial contours extracted.
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