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LBitmap::GetMinMaxVal

Summary

Returns the minimum and maximum intensity values present in a 12 or 16-bit grayscale or a 48 or 64-bit color image.

Syntax

#include "ltwrappr.h"

virtual L_INT LBitmap::GetMinMaxVal(puMinVal, puMaxVal, uFlags = 0)

Parameters

L_INT * puMinVal

Address of a variable to be updated with the minimum intensity value present in the bitmap.

L_INT * puMaxVal

Address of a variable to be updated with the maximum intensity value present in the bitmap.

L_UINT32 uFlags

Reserved for future use. Must be 0.

Returns

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

Comments

The minimum and maximum values can be used to create a lookup table, for use in LBitmap::WindowLevel or LBitmap::WindowLevelBitmap.

This function supports 12 and 16-bit grayscale images. Support for 12 and 16-bit grayscale images is available only in the Document/Medical toolkits.

This function supports signed data images.

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__GetMinMaxValExample() 
{ 
   L_INT nRet; 
   LBitmap LeadBitmap; 
   L_INT nLowBit, nHighBit; 
   L_TCHAR szDummyBuffer[50]; 
 
   nRet =LeadBitmap.Load(MAKE_IMAGE_PATH(TEXT("image1.cmp ")), 16,ORDER_GRAY); 
   if(nRet !=SUCCESS) 
      return nRet; 
 
   if( 
      ((LeadBitmap.IsGrayScale()!=GRAY_NO)&& 
      ((LeadBitmap.LBitmapBase::GetBitsPerPixel()==12)|| 
      (LeadBitmap.LBitmapBase::GetBitsPerPixel()==16))) 
      ) 
   { 
      nRet =LeadBitmap.GetMinMaxVal(&nLowBit, &nHighBit); 
      if(nRet !=SUCCESS) 
         return nRet; 
      wsprintf(szDummyBuffer, TEXT("LowBit= %d\tHighBit= %d"), nLowBit, nHighBit); 
      MessageBox(NULL, szDummyBuffer, TEXT("GetMinMaxBits"), MB_OK); 
   } 
   else 
   { 
      MessageBox(NULL, TEXT("Not a (12 or 16) gray scale image."), TEXT("GetMinMaxBits"), MB_OK); 
      return FAILURE;  
   } 
 
   return SUCCESS; 
}