Classes and Member Functions > LBitmap > LBitmap Member Functions > LBitmap::SignalToNoiseRatio

LBitmap::SignalToNoiseRatio

#include "ltwrappr.h"

virtual L_INT LBitmap::SignalToNoiseRatio(SNR)

SNR value

Finds the signal to noise ratio (SNR) of the Bitmap.

Parameter	Description
SNR	Pointer to a variable to be updated with the SNR value.

Returns

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

Comments

Calculates SNR as the 10*log10 of the real value. This value gives an indication for the homogeneity of adjacent pixels in image.

This function can only process entire images. It does not support regions.

This function supports 24 and 36-bit color images and 8 grayscale images.

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

#define MAKE_IMAGE_PATH(pFileName) TEXT("C:\\Users\\Public\\Documents\\LEADTOOLS Images\\")pFileName 
L_INT LBitmap__SignalToNoiseRatioExample(L_VOID) 
{ 
   L_INT nRet ; 
   LBitmap LeadBitmap ; 
   nRet = LeadBitmap.Load(MAKE_IMAGE_PATH(TEXT("cannon.jpg")), 0,ORDER_BGR); 
   if(nRet !=SUCCESS) 
      return nRet; 
   /* Apply L_SignalToNoiseRatio and find S/N ratio*/ 
   L_FLOAT SNR ; 
   nRet = LeadBitmap.SignalToNoiseRatio(&SNR) ; 
   return nRet ; 
}