Automatically segments a rectangular or circular area in the specified image using the specified threshold.


#include "ltwrappr.h"

virtual L_INT LBitmap::ShrinkWrapTool(nThreshold, ptCenter, nRadius, uFlags)


L_INT nThreshold

Threshold used in the segmentation process. Possible grayscale values range from 0 to 255. the default value is 50.

POINT ptCenter

Center of the rectangle or circle used to segment the object inside. All points inside the search area will be segmented.

L_INT nRadius

Radius of the rectangular or circular search area. Do not exceed the length of the image diagonal. (If nRadius exceeds the length of the image diagonal, the value is adjusted to fit inside the image.)

L_UINT uFlags

Flags that specify the shape to be used. Possible values are:

Value Meaning
SHRINK_CIRCLE [0x0010] Start shrinking from a circular-shaped region.
SHRINK_RECT [0x0008] Start shrinking from a rectangular-shaped region.


Value Meaning
SUCCESS The function was successful.
< 1 An error occurred. Refer to Return Codes.


The result is applied to the image as a region.

This function was designed specifically to segment regions of cancer clusters in CT/MRI images.

The nRadius parameter should not exceed the length of the image diagonal.

This function does not support 32-bit grayscale images.

This function supports signed/unsigned images.

Shrink Wrap Tool Function - Before

Shrink Wrap Tool Function - Before

Shrink Wrap Tool Function - After

Shrink Wrap Tool Function - After

View additional platform support for this Shrink Wrap Tool function.

Required DLLs and Libraries


Win32, x64.

See Also




#if defined (LEADTOOLS_V19_OR_LATER) 
L_INT LBitmap__ShrinkWrapToolExample(L_VOID) 
    L_INT nRet; 
    LBitmap LeadBitmap ; 
    nRet = LeadBitmap.Load(MAKE_IMAGE_PATH(TEXT("IMAGE3.dcm")), 0,ORDER_BGR); 
    if(nRet !=SUCCESS) 
        return nRet ; 
   POINT Center ; 
   Center.x = 245 ; 
   Center.y = 230 ; 
   nRet = LeadBitmap.ShrinkWrapTool(60, Center, 10, SHRINK_RECT); 
   if(nRet !=SUCCESS) 
       return nRet; 
   return SUCCESS; 
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