LBitmap::ColorIntensityBalance

#include "ltwrappr.h"

virtual L_INT LBitmap::ColorIntensityBalance(pShadows, pMidTone, pHighLight, bLuminance, uFlags = 0)

pBALANCEDATA pShadows;

/* pointer to Shadows information */

pBALANCEDATA pMidTone;

/* pointer to Midtones information */

pBALANCEDATA pHighLight;

/* pointer to Highlights information */

L_BOOL bLuminance;

/* value that indicates whether to preserve luminance */

L_UINT32 uFlags;

/* flags */

Changes the distribution of the red, green, or blue channels.

Parameter

Description

pShadows

Pointer to structure used to adjust the dark tones.

pMidTone

Pointer to structure used to adjust the medium tones (midtones).

pHighLight

Pointer to structure used to adjust the bright tones (highlights).

bLuminance

Value that indicates whether to preserve luminance.  Possible values are:

 

Value

Meaning

 

TRUE

Preserve luminance.

 

FALSE

Do not preserve luminance.

uFlags

Reserved for future use. Must be 0.

Returns

SUCCESS

The function was successful.

< 1

An error occurred. Refer to Return Codes.

Comments

This function changes the distribution of the red, green, or blue channels to make the colors in an image more accurate or more different.

Each color component is treated independently. The color range for each component is split into Shadows, Midtones and Highlights based on the intensity. The values in each range are adjusted differently using the BALANCEDATA structures. Positive values from BALANCEDATA for a component cause that particular component to become brighter, whereas negative values cause the component to become darker. A value of 0 leaves the component unchanged.

The preserve luminance option aims to minimize the luminance change in the image.

This function supports only RGB images. It does not support grayscale images.

Support for 48-bit and 64-bit colored images are available only in the Medical toolkits.

To update a status bar or detect a user interrupt during execution of this function, refer to LBase::EnableStatusCallback.

This function does not support signed data images. It returns the error code ERROR_SIGNED_DATA_NOT_SUPPORTED if a signed data image is passed to this function.

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

LTIMGCLR

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:

LBitmap::AdjustTint. LBitmap::ColorHalfTone, LBitmap::ConvertToColoredGray, LBitmapBase::GrayScale, LBitmap::GrayScaleExt, LBitmapBase::IsGrayScale, LBitmap::Sharpen, LBitmap::Posterize, LBitmap::Mosaic, LBitmap::Emboss, LBitmap::MedianFilter, LBitmap::AddNoise, LBitmap::IntensityDetect, LBitmap::SpatialFilter, LBitmap::BinaryFilter, LBitmap::MaxFilter, LBitmap::MinFilter, LBitmap::Oilify, LBitmap::Solarize, LBitmap::WindowLevel, LBitmap::WindowLevelExt, LBitmap::AutoColorLevel, LBitmap::ColorLevel, LBitmap::SelectiveColor

Topics:

Correcting Colors

 

Raster Image Functions: Modifying Intensity Values

 

Raster Image Functions: Changing Brightness and Contrast

 

Raster Image Functions: Correcting Colors

Example

L_INT LBitmap__ColorIntensityBalanceExample(LBitmap *pLeadBitmap) 
{
   BALANCEDATA   Shadows; 
   BALANCEDATA   MidTone;
   BALANCEDATA   HighLight; 
   Shadows.uStructSize  = sizeof(BALANCEDATA); 
   Shadows.nRed     = 60; 
   Shadows.nGreen = 0; 
   Shadows.nBlue  = 0; 
   MidTone.uStructSize  = sizeof(BALANCEDATA); 
   MidTone.nRed     = 40; 
   MidTone.nGreen = 0; 
   MidTone.nBlue  = 0; 
   HighLight.uStructSize = sizeof(BALANCEDATA); 
   HighLight.nRed       = 70; 
   HighLight.nGreen  = 0; 
   HighLight.nBlue   = 0; 
   /* Balance the colors by increasing the red channel values */
   return pLeadBitmap->ColorIntensityBalance(&Shadows, &MidTone, &HighLight, FALSE); 
}