Extracting three-dimensional objects from volume data, with previous techniques, were based on stitching a series of two-dimensional contours together or connecting two-dimensional contours using surface interpolation. Deformable simplex meshes DSM proposes an original surface representation to recover 3D object boundaries and treats data set as a complete volume as opposed to a series of slices. However, it requires that object of interest has been previously isolated from the other objects and the result of reconstruction depends on the interaction process between segmentation and interpolation. Moreover, as like as deformable models, it reveal poor convergence to concave boundaries and require initialization.
In this paper, we propose to solve the problem resulting from the internal force formulation by adding a balloon force. Then, we combine the improved deformable simplex meshes (DSM-Balloon) with watershed method. The segmentation strategy is to use the segmentation result of watershed as prior information for DSM-Balloon. On one hand, the watershed prepares the initial lines for the DSM-Balloon which ensures automatic initialization and simplex meshes convergence. On other hand, the result of DSM-Balloon will overcome the over-segmentation and smoothing problem of watershed.