Geodesic Active Contour 2D 1.1 R (geodesic_active_contour2d)

CISST.Segmentation

[edu.jhu.cs.cisst.plugins.segmentation.PlugInGeodesicActiveContour2D]

Description

Segments a 2D image using a geodesic active contour. The active contour is represented by a levelset where positive values are outside the segmented region and negative values are inside the region. This implementation uses the sparse matrix method to solve PDEs approximated with first-order finite differences.


Notes

The sparse matrix method is roughly a factor of 10x faster than the narrow-band method because it solves PDEs on the minimum narrow-band required for finite difference approximations. It also maintains a valid signed distance function at each time step, so there is no need to periodically rebuild the level set.

Inputs

Name Default Type File Extension Description
Reference Image (Optional) Reference ImageVolume
  • dim{X,Y,1,1}
  • type{any}
Supported Formats Reference Image
Pressure Image (Optional) Pressure ImageVolume
  • dim{X,Y,1,1}
  • type{FLOAT}
Supported Formats Pressure Image
Advection Vector Field (Optional) Advection Vector FieldVolume
  • dim{X,Y,2,1}
  • type{FLOAT}
Supported Formats Advection Vector Field
Initial Levelset Image Initial Levelset ImageVolume
  • dim{X,Y,1,1}
  • type{any}
Supported Formats Initial Levelset Image
Enable Verbose Output falseBoolean - Enable Verbose Output
Target Pressure 0.5Double - Target Pressure
Pressure Weight 0.3Double - Pressure Weight
Curvature Weight 1Double - Curvature Weight
Advection Weight 1Double - Advection Weight
Max Outer Iterations 50Integer - Max Outer Iterations
Max Inner Iterations 100Integer - Max Inner Iterations
Dice Threshold 0.995Double - Dice Threshold


Outputs

Name Type File Extension Description
Level Set Image Volume
  • dim{X,Y,Z,1}
  • type{any}
xml Level Set Image
Verbose Level Set Image (Optional) Volume
  • dim{X,Y,Z,1}
  • type{any}
xml Verbose Level Set Image
Execution Time Performance - Execution Time


Authors


Citations



Last modified by VANDERBILT\landmaba on Thu, 21 Jan 2010 14:27:27 CST