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LBitmap::MinFilter

#include "ltwrappr.h"

virtual L_INT LBitmap::MinFilter(uDim=3, uFlags = 0)

Dilates dark objects in the class objects bitmap by the specified amount.

Parameters

L_UINT uDim

Dimensions of the neighborhood used for filtering (uDim x uDim), in pixels.

Returns

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

Comments

This is a more controlled version of the omni-directional dilation filter that you can set with the LBitmap::BinaryFilter function.

The effect can be controlled by specifying the size of the neighborhood that is used for calculating each pixel value. For example, for 8x8, pass 8 in the uDim parameter. Each pixel is replaced with the minimum value of its neighborhood.

This function can process the whole image or a region of the image.

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 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

LTDIS
LTFIL
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.

Example

L_INT LBitmap__MinFilterExample(LBitmap & Bitmap, L_TCHAR * szFileName) 
{ 
   L_INT nRet; 
    
   nRet =Bitmap.Load(szFileName); 
   if(nRet !=SUCCESS) 
      return nRet; 
   nRet =Bitmap.MinFilter(); 
   if(nRet !=SUCCESS) 
      return nRet; 
    
   return SUCCESS; 
}