A New Stop Term of Level Set Method Based on Modified Gaussian Filter
Ruixing Yu · Journal of Astronautics · 2008
The speed stop term was used to realize image segmentation in traditional level set method.A standard Gaussian filter is often used in speed stop term to make the level set insensitive to the noise.However,the Gaussian smoothing filters,while smoothing out the noise,also remove genuine high-frequency edge features and degrade the detection of low-contrast edges.The level set is a method that evolved according to the edge force,and the smoothing filters in speed stop term should be improved.In this paper a new Gaussian smoothing filter was researched.Firstly,the new Gaussian smoothing filter chooses different scale in the x and y directions to protect the edge.Secondly,discuss the determination of short axis' scale and long axis' scale in Gaussian filter.Last using the new Gaussian smoothing filter as the filter of the speed stop term and evolves the level set function.Finally,the experimental results showed that the developed algorithm is verified well than the traditional one.