Geodesic Active Contour 2D

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 Image	Volume dim{X,Y,1,1} type{any}	Supported Formats	Reference Image
Pressure Image (Optional)	Pressure Image	Volume dim{X,Y,1,1} type{FLOAT}	Supported Formats	Pressure Image
Advection Vector Field (Optional)	Advection Vector Field	Volume dim{X,Y,2,1} type{FLOAT}	Supported Formats	Advection Vector Field
Initial Levelset Image	Initial Levelset Image	Volume dim{X,Y,1,1} type{any}	Supported Formats	Initial Levelset Image
Enable Verbose Output	false	Boolean	-	Enable Verbose Output
Target Pressure	0.5	Double	-	Target Pressure
Pressure Weight	0.3	Double	-	Pressure Weight
Curvature Weight	1	Double	-	Curvature Weight
Advection Weight	1	Double	-	Advection Weight
Max Outer Iterations	50	Integer	-	Max Outer Iterations
Max Inner Iterations	100	Integer	-	Max Inner Iterations
Dice Threshold	0.995	Double	-	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

Blake Lucas (blake@cs.jhu.edu)

Citations

DOI:10.1023/A:1008036829907
DOI:10.1016/0021-9991(88)90002-2
Sethian, J. (1999). Level set methods and fast marching methods, Cambridge university press Cambridge.

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