A Two Stage Contour Evolution Approach for the Measurement of Choroid Thickness in EDI-OCT Images

We propose edge-based object extraction targeting automatic video object plane (VOP) generation in MPEG-4 content-based video coding. In an edge-based VOP generation framework proposed by Meier, the object is represented as a binary edge image that does not generally form a closed contour and that also contains many extra edges, making extracting the object contour accurately less straightforward in such situations. To solve this problem, we adopt a PDE-based contour evolution approach to evolve initial multiple contours contained inside the object toward its boundary based on evolution equations, and to finally merge them into a single contour that accurately represents the object’s shape. Our experimental results using an MPEG standard image sequence show that object contours obtained as we propose appear subjectively more natural in shape compared with those obtained by two conventional methods, especially when the binary object model is not in good condition.

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Two stage contour evolution for automatic segmentation of choroid and cornea in OCT images

Journal of Applied Biomedicine ◽

10.1016/j.bbe.2019.05.012 ◽

2019 ◽

Vol 39 (3) ◽

pp. 686-696

Author(s):

Neetha George ◽

C.V. Jiji

Keyword(s):

Automatic Segmentation ◽

Two Stage ◽

Contour Evolution

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A two-stage VIKOR assisted multi-operator differential evolution approach for Influence Maximization in social networks

Expert Systems with Applications ◽

10.1016/j.eswa.2021.116342 ◽

2021 ◽

pp. 116342

Author(s):

Tarun Kumer Biswas ◽

Alireza Abbasi ◽

Ripon Kumar Chakrabortty

Keyword(s):

Social Networks ◽

Differential Evolution ◽

Influence Maximization ◽

Two Stage ◽

Evolution Approach

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Two-stage self-seeding method for preparation of single crystals of poly(phenylene sulfide)

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100153816 ◽

1989 ◽

Vol 47 ◽

pp. 368-369

Author(s):

Sengshiu Chung ◽

Peggy Cebe

Keyword(s):

Single Crystals ◽

High Performance ◽

Dilute Solution ◽

Two Stage ◽

Annealing Behavior ◽

High Performance Polymers ◽

Seeding Method ◽

Phenylene Sulfide

We are studying the crystallization and annealing behavior of high performance polymers, like poly(p-pheny1ene sulfide) PPS, and poly-(etheretherketone), PEEK. Our purpose is to determine whether PPS, which is similar in many ways to PEEK, undergoes reorganization during annealing. In an effort to address the issue of reorganization, we are studying solution grown single crystals of PPS as model materials.Observation of solution grown PPS crystals has been reported. Even from dilute solution, embrionic spherulites and aggregates were formed. We observe that these morphologies result when solutions containing uncrystallized polymer are cooled. To obtain samples of uniform single crystals, we have used two-stage self seeding and solution replacement techniques.

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