#include "l_bitmap.h"

L_LTIMGCOR_API L_INT L_GetMinMaxVal(pBitmap, pMinVal, pMaxVal, uFlags)

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



Pointer to the bitmap handle of a 12-bit or 16-bit grayscale and 48 and 64-bit bitmap.

L_INT *pMinVal

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

L_INT *pMaxVal

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

L_UINT32 uFlags

Reserved for future use. Must be 0.


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


The minimum and maximum values can be used to create a lookup table, for use in L_WindowLevel or L_WindowLevelBitmap.

For signed bitmaps, the minimum intensity and the maximum intensity values can be negative.

This function supports 12 and 16-bit grayscale. Support for 12 and 16-bit grayscaleimages is available in the Document and Medical Imaging 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


Win32, x64, Linux.

See Also




This example gets the minimum and maximum pixel values for an image.

L_INT GetMinMaxValExample(L_VOID) 
   L_INT nRet; 
   BITMAPHANDLE LeadBitmap;   /* Bitmap handle of the image. */ 
   L_INT  nLow; /* the minimum value */ 
   L_INT  nHigh; /* the maximum value*/ 
   /* Load the bitmap, force 24 bits per pixel */ 
   nRet = L_LoadBitmap (MAKE_IMAGE_PATH(TEXT("ImageProcessingDemo\\brain.tif")), &LeadBitmap, sizeof(BITMAPHANDLE), 0, ORDER_BGRORGRAY, NULL, NULL); 
   if(nRet !=SUCCESS) 
      return nRet; 
   /* get min/max values */ 
   nRet = L_GetMinMaxVal(&LeadBitmap, &nLow, &nHigh, 0); 
   if(nRet !=SUCCESS) 
      return nRet; 
   //free Bitmap 
   return SUCCESS; 

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