L_BinaryFilterBitmap

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#include "l_bitmap.h"

L_LTIMGEFX_API L_INT L_BinaryFilterBitmap(pBitmap, pFilter, uFlags)

pBITMAPHANDLE pBitmap;	/* pointer to the bitmap handle */
pBINARYFLT pFilter;	/* pointer to the binary filter to use */
L_UINT32 uFlags;	/* flags */

Imposes a binary filter on a bitmap.

Parameter	Description
pBitmap	Pointer to the bitmap handle that references the bitmap to be affected.
pFilter	Pointer to the binary filter to use. You can use one of the following predefined filters:
	Value	Meaning
	BFLT_EROSION_OMNI BFLT_EROSION_HORZ BFLT_EROSION_VERT BFLT_EROSION_DIAG	[#define] Shrinks black objects in the image. The effect is biased in the specified direction.
	BFLT_DILATION_OMNI BFLT_DILATION_HORZ BFLT_DILATION_VERT BFLT_DILATION_DIAG	[#define] Enlarges black objects in the image. The effect is biased in the specified direction.
uFlags	Reserved for future use. Must be 0.

Returns

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

Comments

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 in the Document and Medical Imaging toolkits.

This function does not support 32-bit grayscale images. It returns the error code ERROR_GRAY32_UNSUPPORTED if a 32-bit grayscale image is passed to this function.

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

Win32, x64, Linux.

See Also

Functions:	L_SharpenBitmap, L_PosterizeBitmap, L_MosaicBitmap, L_EmbossBitmap, L_AverageFilterBitmap, L_MedianFilterBitmap, L_AddBitmapNoise, L_IntensityDetectBitmap, L_SpatialFilterBitmap, L_MaxFilterBitmap, L_MinFilterBitmap, L_OilifyBitmap, L_SolarizeBitmap,
	L_DlgErosionFilter, L_DlgDilationFilter, L_WindowLevel, L_HolesRemovalBitmapRgn, L_FragmentBitmap, L_HighPassFilterBitmap, L_UnsharpMaskBitmap
Topics:	Raster Image Functions: Filtering Images
	Removing Noise

Example

For complete sample code, refer to the CHILD.C module of the DEMO example. This example loads a bitmap and dilates its black objects.

#define MAKE_IMAGE_PATH(pFileName) TEXT("C:\\Users\\Public\\Documents\\LEADTOOLS Images\\")pFileName


#if defined (LEADTOOLS_V16_OR_LATER)
 L_INT BinaryFilterBitmapExample(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("IMAGE1.CMP")), &LeadBitmap, sizeof(BITMAPHANDLE), 0, ORDER_BGR, NULL, NULL);
   if(nRet !=SUCCESS)
      return nRet;
   /* Dilate black objects */
   nRet = L_BinaryFilterBitmap(&LeadBitmap, BFLT_DILATION_OMNI , 0);
   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;
}
#else
 L_INT BinaryFilterBitmapExample(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("IMAGE1.CMP")), &LeadBitmap, sizeof(BITMAPHANDLE), 0, ORDER_BGR, NULL, NULL);
   if(nRet !=SUCCESS)
      return nRet;
   /* Dilate black objects */
   nRet = L_BinaryFilterBitmap(&LeadBitmap, BFLT_DILATION_OMNI );
   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;
}
#endif // LEADTOOLS_V16_OR_LATER