LBitmap::MedianFilter

#include "ltwrappr.h"

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

Changes the color of each pixel in the class objects bitmap to the median color of pixels in its neighborhood. This is similar to the LBitmap::AverageFilter function, but it is used for noise reduction, rather than a blur effect.

Returns

Comments

You control the effect by specifying the size of the neighborhood that is used for calculating the median value. For 8x8, pass 8 in the uDim parameter.

To update a status bar or detect a user interrupt during execution of this function, refer to LBase::EnableStatusCallback.

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.

If the class objects bitmap has a region, this function works only on the region. If the bitmap does not have a region, the function works on the entire bitmap.

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

See Also

Example

L_INT LBitmap__MedianFilterExample()
{
   L_INT nRet;
   LBitmap LeadBitmap;
   nRet =LeadBitmap.Load(TEXT("%UserProfile%\\My Documents\\LEADTOOLS Images\\image1.cmp"), 0,ORDER_BGR);
   if(nRet !=SUCCESS)
      return nRet;
   nRet =LeadBitmap.MedianFilter();
   if(nRet !=SUCCESS)
      return nRet;
   return SUCCESS;
}