Improving snake performance via a dual active contour
نویسندگان
چکیده
A dual active contour can use two snakes to seek an energy minimum which lies between their initial positions. This relieves problems associated with initialisation. The contraction force is removed by the inclusion of local shape information within the snakes and the parameters required to control their evolution can be combined within a single regularisation parameter. An adaptive driving force is used to move the snakes which reduces the sensitivity to parameters. These developments are demonstrated to provide a performance superior to that of a conventional single snake approach.
منابع مشابه
A Robust Snake Implementation; A Dual Active Contour
A conventional active contour formulation suffers difficulty in appropriate choice of an initial contour and values of parameters. Recent approaches have aimed to resolve these problems but can compromise other performance aspects. To relieve the problem in initialization, we use a dual active contour, which is combined with a local shape model to improve the parameterization. One contour expan...
متن کاملA Dual Active Contour for Improved Snake Performance
Active contours3 (snakes) are a sophisticated approach to contour extraction in image interpretation. They challenge the widely held view that low-level vision tasks such as edge detection are ’bottom-up’ processes; features are extracted from an image and higher level processes interpolate to find a suitable representation. The principal disadvantage with such an approach is its serial nature;...
متن کاملImproving Concavity Performance of Snake Algorithms
Poor convergence to concave boundaries is a limitation in the use of snakes as a contour approximation technique. The external force for active contours, called gradient vector flow (GVF), has provided a remarkable improvement to this problem. However, the technique requires high computation time for reliable concavity performance. In this paper, we propose an efficient solution to overcome the...
متن کاملTracking Deformable Objects with the Active Contour Model
This paper presents a new algorithm for motion tracking of deformable objects by using the active contour model (snake). For robustness, the motion estimation confidence is combined into the snake energy function. Possible degradation measures are also studied for performance monitoring in an interactive tracking system.
متن کاملAn Efficient Converging Snake Algorithm for Locating Object Boundaries
Active contour are now established as a technique for extracting salient contours from an image. A snake is an active contour for representing object contour. Traditional snake algorithms are often used to represent the contour of a single object. A different contour search algorithm is presented in this paper that provides an efficient convergence to the object contours than both the kass et a...
متن کامل