L_GetMinMaxVal
#include "l_bitmap.h"
L_LTIMGCOR_API L_INT L_GetMinMaxVal(pBitmap, pMinVal, pMaxVal)
pBITMAPHANDLE pBitmap; |
/* pointer to the bitmap handle */ |
L_INT *pMinVal; |
/* address of the minimum value variable to be updated */ |
L_INT *pMaxVal; |
/* address of the maximum value variable to be updated */ |
Returns the minimum and maximum intensity values present in a 12 or 16-bit grayscale and 48 and 64-bit image. This function is available in the Document/Medical Toolkits only.
Parameter |
Description |
pBitmap |
Pointer to the bitmap handle of a 12-bit or 16-bit grayscale and 48 and 64-bit bitmap. |
pMinVal |
Address of a variable that will be updated with the minimum intensity value present in the bitmap. |
pMaxVal |
Address of a variable that will be updated with the maximum intensity value present in the bitmap. |
Returns
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 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 only in the Document/Medical 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
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
Windows 2000 / XP/Vista.
See Also
Functions: |
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Example
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 (TEXT("C:\\Program Files\\LEAD Technologies\\LEADTOOLS 15\\Images\\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); if(nRet !=SUCCESS) return nRet; //free Bitmap if(LeadBitmap.Flags.Allocated) L_FreeBitmap(&LeadBitmap); return SUCCESS; }