Available in LEADTOOLS Imaging Pro, Vector, Document, and Medical Imaging toolkits. |
#include "ltwrappr.h"
virtual L_INT LBitmap::MedianFilter(uDim=3, uFlags = 0)
L_UINT uDim; |
/* dimensions of the neighborhood used for filtering (uDim x uDim), in pixels */ |
L_UINT32 uFlags; |
/* flags */ |
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.
Parameter |
Description |
uDim |
Dimensions of the neighborhood used for filtering (uDim x uDim), in pixels |
uFlags |
Reserved for future use. Must be 0. |
Returns
SUCCESS |
The function was successful. |
< 1 |
An error occurred. Refer to Return Codes. |
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
LTDIS 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.
See Also
Example
#define MAKE_IMAGE_PATH(pFileName) TEXT("C:\\Users\\Public\\Documents\\LEADTOOLS Images\\")pFileName L_INT LBitmap__MedianFilterExample() { L_INT nRet; LBitmap LeadBitmap; nRet =LeadBitmap.Load(MAKE_IMAGE_PATH(TEXT("image1.cmp")), 0,ORDER_BGR); if(nRet !=SUCCESS) return nRet; nRet =LeadBitmap.MedianFilter(); if(nRet !=SUCCESS) return nRet; return SUCCESS; }