LBitmap::ColorIntensityBalance
#include "ltwrappr.h"
virtual L_INT LBitmap::ColorIntensityBalance(pShadows, pMidTone, pHighLight, bLuminance)
LPBALANCEDATA pShadows; |
/* pointer to Shadows information */ |
LPBALANCEDATA pMidTone; |
/* pointer to Midtones information */ |
LPBALANCEDATA pHighLight; |
/* pointer to Highlights information */ |
L_BOOL bLuminance; |
/* value that indicates whether to preserve luminance */ |
Changes the distribution of the red, green, or blue channels. This function is available in the Raster Pro and above toolkits.
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. |
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.
Required DLLs and Libraries
LTIMG 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
Example
void TestFunction(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 */
pLeadBitmap->ColorIntensityBalance(&Shadows, &MidTone, &HighLight, FALSE);
}