Journal ArticleDOI
Segmentation of two-phase flow: a free representation for Level Set method with a priori knowledge
TLDR
The promising results indicate that image segmentation by the proposed approach gives good results and it can be used as an efficient method to validate other existing approaches to flow measurement instrumentation.Abstract:
In this paper, an extension of digital images segmentation approach based on active contours, or snakes approach, and an extension of shape model are unified in order to develop a free representation for level set method with a priori knowledge. The proposed method improves the average freely previously trained format, using the method of contour active for Level Set. In this case, there is no restriction to interface evolution as occurs in other approaches that combine active contours and prior knowledge. This approach is used for the correct identification of gas bubble shape in gas–liquid two-phase flow. The main objective of this work is to provide a validation system to support the development of other flow measurements tools based on widely used instrumentation. The promising results indicate that image segmentation by the proposed approach gives good results and it can be used as an efficient method to validate other existing approaches to flow measurement instrumentation.read more
Citations
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Book ChapterDOI
Bubble Shape Identification and Calculation in Gas-Liquid Slug Flow Using Semi-automatic Image Segmentation
Mauren Louise Sguario Coelho de Andrade,Lúcia Valéria Ramos de Arruda,Eduardo Nunes dos Santos,Daniel R. Pipa +3 more
TL;DR: Preliminary results in the segmentation of gas bubbles images in horizontal flow proposed here help a better identification of the shapes of elongated bubbles.
References
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Journal ArticleDOI
Snakes : Active Contour Models
TL;DR: This work uses snakes for interactive interpretation, in which user-imposed constraint forces guide the snake near features of interest, and uses scale-space continuation to enlarge the capture region surrounding a feature.
Journal ArticleDOI
Fronts propagating with curvature-dependent speed: algorithms based on Hamilton-Jacobi formulations
Stanley Osher,James A. Sethian +1 more
TL;DR: The PSC algorithm as mentioned in this paper approximates the Hamilton-Jacobi equations with parabolic right-hand-sides by using techniques from the hyperbolic conservation laws, which can be used also for more general surface motion problems.
Journal ArticleDOI
Active shape models—their training and application
TL;DR: This work describes a method for building models by learning patterns of variability from a training set of correctly annotated images that can be used for image search in an iterative refinement algorithm analogous to that employed by Active Contour Models (Snakes).
Journal ArticleDOI
A fast marching level set method for monotonically advancing fronts
TL;DR: A fast marching level set method is presented for monotonically advancing fronts, which leads to an extremely fast scheme for solving the Eikonal equation.