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Image Foresting Transform using non-smooth connectivity functions and its applications in the segmentation of medical and natural images with strong heterogeneity

Grant number: 12/06911-2
Support Opportunities:Scholarships in Brazil - Master
Effective date (Start): October 01, 2012
Effective date (End): February 28, 2014
Field of knowledge:Physical Sciences and Mathematics - Computer Science - Computing Methodologies and Techniques
Principal Investigator:Paulo André Vechiatto de Miranda
Grantee:Lucy Alsina Choque Mansilla
Host Institution: Instituto de Matemática e Estatística (IME). Universidade de São Paulo (USP). São Paulo , SP, Brazil


Quantitative analysis of brain structures from magnetic resonance images (MRI) has played an important role in research in neurology and can be very useful in diagnosis and treatment of diseases related to changes in the anatomy ofthe human brain. Analysis techniques, however, require a precise definition of the extent of the three-dimensional structures under study. This operation called image segmentation is one of the most fundamental and challenging problems in image processing and computer vision.Methods based on the Image Foresting Transform (IFT) have been successfully used in the segmentation of MRI 1.5 Tesla. However, within the framework of the IFT, there is a class of connectivity functions little explored, which corresponds to the non-smooth connectivity functions (FCNS). These functions are more adaptive and can cope with the problems of field inhomogeneity, which are common in MR images of 3 Tesla. However, further study is needed.The solutions may also be useful in the handling of natural images with strong variation in brightness / shadow. The proposal aims to investigate the FCNS from the standpoint of theoretical and experimental aspects.More specifically, the methods developed will be integrated into a single computational tool that will serve as an important step for several other future research, continuing the work that has been developed under the program-CInAPCe FAPESP, which is held in conjunction with the professors of the Department of Neurology, University of Campinas and other institutions.

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Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
MIRANDA, PAULO A. V.; MANSILLA, LUCY A. C.. Oriented Image Foresting Transform Segmentation by Seed Competition. IEEE Transactions on Image Processing, v. 23, n. 1, p. 389-398, . (11/50761-2, 12/06911-2)
Academic Publications
(References retrieved automatically from State of São Paulo Research Institutions)
MANSILLA, Lucy Alsina Choque. Image foresting transform with non-smooth connectivity functions: adaptive weights, boundary polarity, and shape constraints. 2014. Master's Dissertation - Universidade de São Paulo (USP). Instituto de Matemática e Estatística (IME/SBI) São Paulo.

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