关键词: 区域分割, 活动轮廓, 流体静力学, 图像分割

Abstract: A new active contour model for region-based segmentation of grayscale image is proposed
in this paper. This model bases on the theory of fluid statics. The model uses the theory of hydrostatic
to drive a closed continuous simple curve defined on a gray image and contracts the curve constantly
until the curve converges to a region boundary. In this process, the pixels of the closed continuous
simple curve are sorted into some regions by the model according to the nature of the pixels.
Reinitializing the related variables and activating the closed continuous simple curve which has
converged to the boundary of the region, the model continues to drive the curve until the curve
converges to the boundary of a new embedded region or converges to a point. In the process of
driving a simple closed continuous curve by the model, the cure may be split into some closed
continuous curves. When a closed curve converges to a point, the segmentation for the region
surrounded by the closed curve is complete. This model is able to segment multiple regions, and able
to segment the regions which are in the interior of another region of a grayscale image.

Key words: region-based segmentation, active contour, fluid statics, image segmentation