# Refactoring Level-Set framework - V4: Difference between revisions

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== Tcons == | == Tcons == | ||

=== | * 29 July. Attendees: Karthik Krishnan (Kitware), Lucas Antiga (Orobix), Kishore Mosaliganti (Harvard), Arnaud Gelas (Harvard) | ||

* 1 September. Attendees: Olivier Bernard (Creatis), Joel Schaerer (Creatis), Kishore Mosaliganti (Harvard), Arnaud Gelas (Harvard) | |||

== Ideas == | |||

=== Term class === | |||

* One weight (scalar) | |||

* One Level Set Function | |||

* virtual GetCFLContribution() = 0; | |||

* virtual Value() = 0; | |||

* virtual bool IsStreamable() = 0 | |||

=== Term Container class === | |||

* std::map< id, Term > to be able to dynamically chaVirtual Value() = 0; | |||

* bool IsStreamable(); // iterate on all term elements as long as there is streamable element. | |||

=== Term Sum Container === | |||

Inherit form Term Container | |||

Implement Value as sum of all elements from the container | |||

=== Term Product Container === | |||

Inherit form Term Container | |||

Implement Value as product of all elements from the container | |||

=== LevelSetFunctionBase === | |||

Virtual Value() = 0; | |||

Virtual Grad() = 0; | |||

Virtual Hessian() = 0; | |||

Virtual bool IsStreamable() = 0; | |||

=== LocalStructure === | |||

Location x | |||

Std::pair< bool, xxx > value (bool encode if its characteristics has already been computed) | |||

Std::pair< bool, xxx > grad | |||

Etc… | |||

=== Reinitialization Filter === | |||

Input: one level set function | |||

Output: one level set function | |||

Virtual void GenerateData() = 0; // processing | |||

=== Stopping criterion === | |||

Functor? | |||

Phi^{n} | |||

Phi^{n-1} | |||

Number of iterations | |||

Check for additional values that can be passed (to avoid as much as possible explosion of computational cost!!!) | |||

=== SamplingDomain === | |||

Represents the domain where the level set PDE is sampled, and thus used to solve the PDE equation. | |||

Iterator Begin(); | |||

Iterator End(); | |||

Iterator Iterator::operator ++ ( -- ? ) |

## Revision as of 14:00, 1 September 2010

This page outlines the proposed changes to the current Level-Set framework. A number of these changes will break backwards compatibility.

## Authors

The proposed changes for the Level-Set framework are being proposed by the Megason-Lab, Systems Biology Department, Harvard Medical School.

Questions and comments regarding these changes should be sent to

- Arnaud Gelas (arnaud_gelas -at- hms.harvard.edu)
- Sean Megason (sean_megason -at- hms.harvard.edu)

Other team members include:

- Kishore Mosaliganti (kishore_mosaliganti -at- hms.harvard.edu)
- Nicolas Rannou (nicolas_rannou -at- hms.harvard.edu)

## Tcons

* 29 July. Attendees: Karthik Krishnan (Kitware), Lucas Antiga (Orobix), Kishore Mosaliganti (Harvard), Arnaud Gelas (Harvard) * 1 September. Attendees: Olivier Bernard (Creatis), Joel Schaerer (Creatis), Kishore Mosaliganti (Harvard), Arnaud Gelas (Harvard)

## Ideas

### Term class

- One weight (scalar)
- One Level Set Function
- virtual GetCFLContribution() = 0;
- virtual Value() = 0;
- virtual bool IsStreamable() = 0

### Term Container class

- std::map< id, Term > to be able to dynamically chaVirtual Value() = 0;
- bool IsStreamable(); // iterate on all term elements as long as there is streamable element.

### Term Sum Container

Inherit form Term Container Implement Value as sum of all elements from the container

### Term Product Container

Inherit form Term Container Implement Value as product of all elements from the container

### LevelSetFunctionBase

Virtual Value() = 0; Virtual Grad() = 0; Virtual Hessian() = 0; Virtual bool IsStreamable() = 0;

### LocalStructure

Location x Std::pair< bool, xxx > value (bool encode if its characteristics has already been computed) Std::pair< bool, xxx > grad Etc…

### Reinitialization Filter

Input: one level set function Output: one level set function Virtual void GenerateData() = 0; // processing

### Stopping criterion

Functor? Phi^{n} Phi^{n-1} Number of iterations Check for additional values that can be passed (to avoid as much as possible explosion of computational cost!!!)

### SamplingDomain

Represents the domain where the level set PDE is sampled, and thus used to solve the PDE equation. Iterator Begin(); Iterator End(); Iterator Iterator::operator ++ ( -- ? )