L_MeanShiftFilterBitmap

#include "l_bitmap.h"

L_LTIMGCOR_API L_INT L_MeanShiftFilterBitmap(pBitmap, nRadius, nColorDistance, uFlags)

pBITMAPHANDLE pBitmap;	pointer to the bitmap handle
L_INT nRadius;	size of kernel
L_UINT nColorDistance;	color difference
L_UINT32 uFlags;	flags

Performs noise reduction while preserving detail.

Parameter	Description
pBitmap	Pointer to the bitmap handle that references the bitmap to be updated.
nRadius	Size of the kernel where the middle pixel would be considered as the source pixel.
nColorDistance	Color difference between the investigated pixel and the source pixel.
uFlags	Reserved for future use. Must be 0.

Returns

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

Comments

To keep details while removing noise, pass low positive values to ColorDistance parameter.

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

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

This example loads a bitmap and applies the MeanShift Filter on it

#define MAKE_IMAGE_PATH(pFileName) TEXT("C:\\Users\\Public\\Documents\\LEADTOOLS Images\\")pFileName 
L_INT MeanShiftFilterExample(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; 
   //Apply Sigma filter 
   nRet = L_MeanShiftFilterBitmap(&LeadBitmap, 5, 10, 0); 
   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

Introduction

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LEADTOOLS Raster Imaging Features

Redistributables/Files To Be Included With Your Application

Functions:	L_HistoEqualizeBitmap, L_ChangeBitmapContrast, L_ChangeBitmapIntensity, L_GammaCorrectBitmap, L_HistoContrastBitmap, L_StretchBitmapIntensity, L_InvertBitmap, L_ChangeBitmapHue, L_ChangeBitmapSaturation, L_FillBitmap, L_GetPixelColor, L_PutPixelColor, L_GetBitmapHistogram, L_WindowLevel, L_LocalHistoEqualizeBitmap, L_ChangeHueSatIntBitmap, L_AdjustBitmapTint, L_GammaCorrectBitmapExt
Topics:	Raster Image Functions: Filtering Images
	Removing Noise