virtual L_INT LBitmap::WatershedBitmap(ppPoints, pLengths, nSize)
Separates the image into different segments using the Watershed algorithm.
Holds the initial point/path that represents the point or path from which to segment the bitmap.
Number of points in each path.
Number of paths.
Value | Meaning |
---|---|
SUCCESS | The function was successful. |
< 1 | An error occurred. Refer to Return Codes. |
Each segment's pixels have the same color. The Watershed algorithm treats an image as if it were a topographic surface.
The dark areas are basins. The light areas are the ridges around the basins.
The user is responsible for determining the number of output segments and the location of each segment in the input array.
This function supports 8- and 16-bit grayscale and colored images and 24- and 32-bit colored images.
This function does not support 32-bit grayscale images.
This function supports signed/unsigned images.
Win32, x64.
#if defined (LEADTOOLS_V19_OR_LATER)
L_INT LBitmap__WatershedBitmapExample(L_VOID)
{
L_INT nRet;
LBitmap LeadBitmap;
nRet =LeadBitmap.Load(MAKE_IMAGE_PATH(TEXT("IMAGE3.dcm")), 0,ORDER_BGR);
if(nRet !=SUCCESS)
return nRet ;
/* Apply a WatershedBitmap filter */
L_POINT* ppPoints[4] = {} ;
L_INT Lengths[4] = {} ;
L_INT nSize = 4 ;
for(L_INT i = 0 ; i < nSize; i++)
{
Lengths[i] = 2 ;
ppPoints[i] = (L_POINT*) malloc(Lengths[i]*sizeof(L_POINT));
if ( ppPoints[i] == NULL )
{
for( L_INT j = 0 ; j < nSize ; j++ )
{
if ( ppPoints[j] != NULL )
{
free(ppPoints[j]) ;
}
}
return ERROR_NOT_ENOUGH_MEMORY ;
}
}
ppPoints[0][0].x = 35 ; ppPoints[0][0].y = 100 ;
ppPoints[0][1].x = 35 ; ppPoints[0][1].y = 200 ;
ppPoints[1][0].x = 180 ; ppPoints[1][0].y = 115 ;
ppPoints[1][1].x = 300 ; ppPoints[1][1].y = 115 ;
ppPoints[2][0].x = 235 ; ppPoints[2][0].y = 220 ;
ppPoints[2][1].x = 260 ; ppPoints[2][1].y = 220 ;
ppPoints[3][0].x = 180 ; ppPoints[3][0].y = 330 ;
ppPoints[3][1].x = 350 ; ppPoints[3][1].y = 330 ;
nRet = LeadBitmap.WatershedBitmap(ppPoints, Lengths, nSize);
for( L_INT j = 0 ; j < nSize ; j++ )
{
free(ppPoints[j]) ;
}
return nRet ;
}
#endif // LEADTOOLS_V19_OR_LATER
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