L_LTIMGCLR_API L_INT L_ColorIntensityBalance(pBitmap, pShadows, pMidTone, pHighLight, bLuminance, uFlags)
Changes the distribution of the red, green, or blue channels.
Pointer to the bitmap handle that references the bitmap on which to apply the effect.
Pointer to structure used to adjust the dark tones.
Pointer to structure used to adjust the medium tones (midtones).
Pointer to structure used to adjust the bright tones (highlights).
Value that indicates whether to preserve luminance. Possible values are:
|FALSE||Do not preserve luminance.|
Reserved for future use. Must be 0.
|SUCCESS||The function was successful.|
|< 1||An error occurred. Refer to Return Codes.|
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 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.
This function supports 48 and 64-bit color images. Support for 48 and 64-bit color images is available in the Document and Medical Imaging toolkits.
To update a status bar or detect a user interrupt during execution of this function, refer to L_SetStatusCallback.
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
Win32, x64, Linux.
BITMAPHANDLE LeadBitmap; /* Bitmap handle for the image */
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;
/* Load a bitmap at its own bits per pixel */
nRet = L_LoadBitmap (MAKE_IMAGE_PATH(TEXT("sample5.cmp")), &LeadBitmap, sizeof(BITMAPHANDLE), 0, ORDER_BGR, NULL, NULL);
/* Balance the colors by increasing the red channel values */
nRet = L_ColorIntensityBalance(&LeadBitmap, &Shadows, &MidTone, &HighLight,FALSE, 0);
nRet = L_SaveBitmap(MAKE_IMAGE_PATH(TEXT("Result.BMP")), &LeadBitmap, FILE_BMP, 24, 0, NULL);
Medical Web Viewer .NET
.NET, Java, Android, and iOS/macOS Assemblies
C API/C++ Class Libraries