LEADTOOLS Raster Imaging C DLL Help > Function References > 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
For a listing of the exact DLLs and Libraries needed, based on the toolkit version, refer to Files To Be Included With Your Application. |
Win32, x64, Linux.
See Also
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 #if defined (LEADTOOLS_V17_OR_LATER) 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; } #endif //(LEADTOOLS_V17_OR_LATER)