L_HolesRemovalBitmapRgn

#include "l_bitmap.h"

L_LTIMGEFX_API L_INT L_HolesRemovalBitmapRgn(pBitmap)

pBITMAPHANDLE pBitmap;

/* pointer to the bitmap handle */

Removes all the holes in a region. This function is available in the Document/Medical Toolkits.

Parameter

Description

pBitmap

Pointer to the bitmap handle referencing the bitmap to be changed.

Returns

SUCCESS

The function was successful.

< 1

An error occurred. Refer to Return Codes.

Comments

This function is designed to work on bitmaps that have a region. It removes the holes from the bitmaps region. If this function is used with a bitmap that does not have a region, the "Invalid Parameter" error is returned.

To update a status bar or detect a user interrupt during execution of this function, refer to L_SetStatusCallback.

This function supports 12 and 16-bit grayscale and 48 and 64-bit color images. Support for 12 and 16-bit grayscale and 48 and 64-bit color images is available only in the Document/Medical toolkits.

This function supports 32-bit grayscale images.

Required DLLs and Libraries

LTIMGEFX

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

Windows 2000 / XP/Vista.

See Also

Functions:

L_IntensityDetectBitmap, L_SpatialFilterBitmap, L_BinaryFilterBitmap, L_MaxFilterBitmap, L_MinFilterBitmap, L_SetBitmapRgnMagicWand, L_SmoothBitmap, L_BorderRemoveBitmap, L_InvertedTextBitmap, L_DotRemoveBitmap, L_HolePunchRemoveBitmap

Topics:

Working with the Existing Bitmap Region

 

Raster Image Functions: Creating and Using a Region

 

Color Halftone and Halftone Images

Example

This example loads a bitmap, defines a region on it after converting to 1bit black and white, and applies the holes removal filter to remove small white or black segments 

 L_INT HolesRemovalBitmapRgnExample(L_VOID)
{
   L_INT nRet;
   BITMAPHANDLE LeadBitmap;
   
   /* Load the bitmap, keeping the bits per pixel of the file */
   nRet = L_LoadBitmap (TEXT("C:\\Program Files\\LEAD Technologies\\LEADTOOLS 15\\Images\\IMAGE1.CMP"), &LeadBitmap, sizeof(BITMAPHANDLE), 0, ORDER_BGR, NULL, NULL);
   if(nRet !=SUCCESS)
      return nRet;
   /*convert to 1-bit black and white*/
   nRet = L_ColorResBitmap(&LeadBitmap, &LeadBitmap, sizeof(BITMAPHANDLE), 1,CRF_FIXEDPALETTE, 
                           NULL, NULL, 0, NULL, NULL);
   if(nRet !=SUCCESS)
      return nRet;

   /*Set the region around the black or white region according to (0,0) color*/
   nRet = L_SetBitmapRgnMagicWand(&LeadBitmap,0, 0, RGB(0,0,0), RGB(25,25,25), L_RGN_SET);
   if(nRet !=SUCCESS)
      return nRet;

   /*Remove holes around the black or white regions*/
   nRet = L_HolesRemovalBitmapRgn (&LeadBitmap);
   if(nRet !=SUCCESS)
      return nRet;

   /* Fill the region with balck color*/
   L_FillBitmap(&LeadBitmap, RGB(0,0,0));
   L_SaveBitmap(TEXT("C:\\Program Files\\LEAD Technologies\\LEADTOOLS 15\\Images\\Result.BMP"), &LeadBitmap, FILE_BMP, 24, 0, NULL);
   //free bitmap 
   if(LeadBitmap.Flags.Allocated)  
      L_FreeBitmap(&LeadBitmap);  

   
 
   return SUCCESS;
}