Most of conventional active contour models are not capable of extracting objects with complex image features or background, because they are deformed mainly based on the local image features along the contours. To deal with this problem, we propose a novel extracting method which reflects wide-ranging region information to region extracting process through competition of active contours. I n th...

This paper presents a combined approach for detecting building rooftops in satellite images. The proposed method is an active contour based approach combined with local texture and edge information for curve evolution. This method allows extraction of multiple buildings simultaneously. Verification for accepting or rejecting rooftop hypotheses is performed based on the existence of shadow evide...

Background: With advances in medical imaging systems, digital dermoscopy has become one of the major imaging modalities in the analysis of skin lesions. Thus, automated segmentation or border detection has a great impact on the subsequent steps of skin cancer computer-aided diagnosis using demoscopy images. Since dermoscopy images suffer from artifacts such as shading and hair, there is a need ...

The use of energy-minimizing curves, known as \snakes", to extract features of interest in images has been introduced by Kass, Witkin & Terzopoulos. We present a model of deformation which solves some of the problems encountered with the original method. The external forces that push the curve to the edges are modiied to give more stable results. The original snake, when it is not close enough ...

A parametric active contour model is presented for object tracking based on matching degree image of object contour points. We first construct a matching degree image according to object contour points, and track the object using parametric active contours. This paper presents a new feature matching approach and a new directional filter. Assuming that the motion of objects is small in this pape...

Article history: Received 20 January 2015 Accepted 02 April 2015 Published 20 May 2015

This paper presents the incorporation of a new internal force for active contours. This internal force is generated by an electric charge, distributed all-over the active contour. Our extended contour model can describe objects with high curvature, without increasing the number of control points.

Active contour models have been widely applied to image segmentation and analysis. It has been successfully used in contour detection for object recognition, computer vision, computer graphics, and biomedical image processing such as X-ray, MRI and Ultrasound images. The energy-minimizing active contour models or snakes were developed by Kass, Witkin and Terzopoulos in 1987. Snakes are curves d...