#include "ltwrappr.h"

virtual L_INT LBitmap::LevelsetBitmapRgn(LambdaIn, LambdaOut)

L_INT LambdaIn;

the weight of moving the contour inside

L_INT LambdaOut;

the weight of moving the contour outside

Performs semi-automatic segmentation (using the Levelset algorithm) by shrinking or expanding a contour represented by a region to the objects in the image.

Parameter Description
LambdaIn Represents the weight of moving the contour inside. The default value is 1.
LambdaOut Represents the weight of moving the contour outside. The default value is 1.



The function was successful.

< 1

An error occurred. Refer to Return Codes.


If the image has no region this function assumes a rectangular region that covers the image.

The Levelset algorithm finds the best-fitting contour that encapsulates the object.

Equal values for lambdaIn and lambdaOut allow the algorithm to decide whether to shrink or expand the selected region.

This function supports 12- and 16-bit grayscale and 48- and 64-bit color images.

This function supports signed/unsigned images.

Required DLLs and Libraries


For a listing of the exact DLLs and Libraries needed, based on the toolkit version, refer to Files To Be Included With Your Application.


Win32, x64.

See Also


LBitmap::OtsuThreshold, LBitmap::LambdaConnectedness, LBitmap::ShrinkWrapTool, LBitmap::WatershedBitmap, LBitmap::GWireGetMinPath, LBitmap::KMeansBitmapSegmentation, Class Members


#define MAKE_IMAGE_PATH(pFileName) TEXT("C:\\Users\\Public\\Documents\\LEADTOOLS Images\\")pFileName 
#if defined (LEADTOOLS_V19_OR_LATER) 
L_INT LBitmap__LevelsetBitmapRgnExample(L_VOID) 
   L_INT nRet ; 
   LBitmap LeadBitmap ; 
   nRet = LeadBitmap.Load(MAKE_IMAGE_PATH(TEXT("IMAGE3.dcm")), 0,ORDER_BGR); 
   if(nRet !=SUCCESS) 
      return nRet ; 
   RECT MainRect ; 
   MainRect.left   = 200 ; 
   MainRect.right  = 300 ;    = 200 ; 
   MainRect.bottom = 250 ; 
   LBitmapRgn Region(&LeadBitmap); 
   nRet = Region.SetRgnRect(&MainRect); 
   if(nRet != SUCCESS) 
      return nRet ; 
   // found level set region 
   nRet = LeadBitmap.LevelsetBitmapRgn(1, 1) ; 
   if( nRet !=SUCCESS ) 
      return nRet ; 
   return SUCCESS; 

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