LBitmap::GetLinearVOILUT

#include "ltwrappr.h"

virtual L_INT LBitmap::GetLinearVOILUT(pCenter, pWidth, uFlags)

L_DOUBLE * pCenter;	/* pointer to a variable to be updated */
L_DOUBLE * pWidth;	/* pointer to a variable to be updated */
L_UINT uFlags;	/* flags */

Gets the window center and the window width, if the LUT stored inside pBitmap is linear. If the LUT stored inside the object is not linear, the function will fail.

Parameter	Description
pCenter	Pointer to a variable to be updated with the center of the range of color intensities that define your window of interest, if the LUT is linear. Cannot be NULL.
pWidth	Pointer to a variable to be updated with the range of color intensities that define your window of interest, if the LUT is linear. Cannot be NULL.
uFlags	Reserved for future use. Pass 0 for now.

Returns

SUCCESS	LUT is Linear (success).
0	LUT is not linear (fail).
<0	An error occurred. Refer to Return Codes.

Comments

You have to pay attention to your signed images LUT. The upper half should contain negative values and lower half contains positive values.

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

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.

See Also

Functions:	LBitmap::WindowLevel, LBitmap::WindowLevelFillLUT, LBitmap::GetUserLookupTable, LBitmap::RemapIntensity, LBitmap::ApplyLinearVOILUT, Class Members
Topics:	Raster Image Functions: Palettes

Example

checks the linearity of the LUT and computes its window width and center by using the GetLinearVOILUT function.

L_INT LBitmap__GetLinearVOILUTExample(LBitmap * pBitmap, L_DOUBLE * pCenter, L_DOUBLE *pWidth) 
{
   return pBitmap->GetLinearVOILUT(pCenter, pWidth, 0); 
}