L_GetMinMaxBits
#include "l_bitmap.h"
L_LTIMGCOR_API L_INT L_GetMinMaxBits(pBitmap, pLowBit, pHighBit, uFlags)
pBITMAPHANDLE pBitmap; |
/* pointer to the bitmap handle */ |
L_INT *pLowBit; |
/* address of a low bit variable to be updated */ |
L_INT *pHighBit; |
/* address of a high bit variable to be updated */ |
L_UINT32 uFlags; |
/* flags */ |
Returns the low and high bits of the values present in a 12 or 16-bit grayscale and 48 and 64-bit image.
Parameter |
Description |
pBitmap |
Pointer to the bitmap handle of a 12-bit or 16-bit grayscale and 48 and 64-bit bitmap. |
pLowBit |
Address of a variable that will be updated with the lowest bit set in the bitmap. |
pHighBit |
Address of a variable that will be updated with the highest bit set in the bitmap. |
uFlags |
Reserved for future use. Must be 0. |
Returns
SUCCESS |
The function was successful. |
< 1 |
An error occurred. Refer to Return Codes. |
Comments
The minimum and maximum bit values can be used to specify the range of useful bits and to create a lookup table, for use in L_WindowLevel or L_WindowLevelBitmap.
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
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.
See Also
Functions: |
|
Topics: |
|
|
|
|
|
|
Example
This example gets the minimum and maximum bits for an image.
#if defined (LEADTOOLS_V16_OR_LATER) L_INT GetMinMaxBitsExample(L_VOID) { L_INT nRet; BITMAPHANDLE LeadBitmap; /* Bitmap handle of the image. */ L_INT nLowBit; /* the low bit variable */ L_INT nHighBit; /* the high bit variable */ /* Load the bitmap, keeping the bits per pixel of the file */ 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 bits */ nRet = L_GetMinMaxBits(&LeadBitmap, &nLowBit, &nHighBit, 0); if(nRet !=SUCCESS) return nRet; nRet = L_SaveBitmap(MAKE_IMAGE_PATH(TEXT("Result.BMP")), &LeadBitmap, FILE_BMP, 24, 0, NULL); if(nRet !=SUCCESS) return nRet; //free Bitmap if(LeadBitmap.Flags.Allocated) L_FreeBitmap(&LeadBitmap); return SUCCESS; } #else L_INT GetMinMaxBitsExample(L_VOID) { L_INT nRet; BITMAPHANDLE LeadBitmap; /* Bitmap handle of the image. */ L_INT nLowBit; /* the low bit variable */ L_INT nHighBit; /* the high bit variable */ /* Load the bitmap, keeping the bits per pixel of the file */ 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 bits */ nRet = L_GetMinMaxBits(&LeadBitmap, &nLowBit, &nHighBit); if(nRet !=SUCCESS) return nRet; nRet = L_SaveBitmap(MAKE_IMAGE_PATH(TEXT("Result.BMP")), &LeadBitmap, FILE_BMP, 24, 0, NULL); if(nRet !=SUCCESS) return nRet; //free Bitmap if(LeadBitmap.Flags.Allocated) L_FreeBitmap(&LeadBitmap); return SUCCESS; } #endif // LEADTOOLS_V16_OR_LATER