L_ShrinkWrapTool

#include "Ltimgcor.h"

L_LTIMGCOR_API L_INT L_ShrinkWrapTool(pBitmap, nThreshold, ptCenter, nRadius, uFlags)

pBITMAPHANDLE pBitmap;	pointer to the bitmap handle
L_INT nThreshold;	segmentation threshold
POINT ptCenter;	center of the rectangular or circular search area
L_INT nRadius;	radius of the rectangle/circle to be segmented
L_UINT uFlags;	flags that specify the shape to be used

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

Parameter	Description
pBitmap	Pointer to the bitmap handle.
nThreshold	Threshold used in the segmentation process. Possible grayscale values range from 0 to 255. The default value is 50.
ptCenter	Center of the rectangle or circle used to segment the object inside. All points inside the search area will be segmented.
nRadius	Radius of the rectangular or circular search area, in pixels. 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.)
uFlags	Flags that specify the shape to be used. Possible values are:
	Value	Meaning
	SHRINK_CIRCLE	[0x00000008] Start shrinking from a circular-shaped region.
	SHRINK_RECT	[0x00000010] Start shrinking from a rectangular-shaped region.

Returns

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

Comments

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 command does not support 32-bit grayscale images.

This command supports signed/unsigned images.

Required DLLs and Libraries

LTIMGCOR

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

Platforms

Win32, x64, Linux.

Example

#define MAKE_IMAGE_PATH(pFileName) TEXT("C:\\Users\\Public\\Documents\\LEADTOOLS Images\\")pFileName 
L_INT ShrinkWrapToolExample(L_VOID) 
{ 
   L_INT nRet; 
   BITMAPHANDLE LeadBitmap;   /* Bitmap handle to hold the loaded image. */ 
   /* Load the bitmap, keeping the bits per pixel of the file */ 
   nRet = L_LoadBitmap (MAKE_IMAGE_PATH(TEXT("IMAGE3.dcm")), &LeadBitmap, sizeof(BITMAPHANDLE), 0, ORDER_BGR, NULL, NULL); 
   if(nRet != SUCCESS) 
      return nRet ; 
   POINT Center ; 
   Center.x = 245 ; 
   Center.y = 230 ; 
   nRet = L_ShrinkWrapTool(&LeadBitmap, 60, Center, 10, SHRINK_RECT); 
   if(nRet !=SUCCESS) 
      return nRet; 
   nRet = L_SaveBitmap(MAKE_IMAGE_PATH(TEXT("Result.BMP")), &LeadBitmap, FILE_BMP, 24, 0, NULL); 
   if(nRet !=SUCCESS) 
      return nRet; 
   //free bitmap 
   if(LeadBitmap.Flags.Allocated) 
      L_FreeBitmap(&LeadBitmap); 
   return SUCCESS; 
}

Help Version 19.0.2017.10.27

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LEADTOOLS Raster Imaging C API Help

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LEADTOOLS Raster Imaging Features

Redistributables/Files To Be Included With Your Application

Functions:	L_LevelsetBitmapRgn, L_LambdaConnectedness, L_WatershedBitmap, L_KMeansBitmapSegmentation, L_GWireGetMinPath
Topics:	Raster Image Functions: Creating and Using a Region
	Creating a Bitmap Region