Increases or decreases the brightness in the bitmap by multiplying the colors in the specified bitmap by a value equal to the
uFactor value divided by 100.
L_LTIMGCLR_API L_INT L_MultiplyBitmap(pBitmap, uFactor, uFlags)
Pointer to the bitmap handle referencing the bitmap to be changed.
An integer which represents the factor to be used when multiplying image values. The factor used is equal to uFactor/100.
Reserved for future use. Must be 0.
|SUCCESS||The function was successful.|
|< 1||An error occurred. Refer to Return Codes.|
This function is used to increase or decrease the brightness in the bitmap by multiplying the colors in the specified bitmap by a value equal to the uFactor value divided by 100. For example, if
uFactor is 131, the colors in the specified bitmap will be multiplied by 1.31.
This function supports 12 and 16-bit grayscale and 48 and 64-bit color images. Support for 12 and 16-bit grayscale and 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.
This function increases or decreases brightness in the image data. If the image has a LUT, the function will work on the LUT, not the image data. If the image has a LUT and you want to work on the image data, set the UseLUT Flag in the BITMAPHANDLE structure to FALSE. Then, after calling the function, reset the UseLUT flag to TRUE as follows:
pBitmap->Flags.UseLUT = FALSE;
L_MultiplyBitmap(pBitmap, 151, 0);
pBitmap->Flags.UseLUT = TRUE;
Multiply Function - Before
Multiply Function - After
View additional platform support for this Multiply function.
Win32, x64, Linux.
This example loads a bitmap and multiplies it with 1.51 factor
BITMAPHANDLE LeadBitmap; /* Bitmap handle to hold the loaded image. */
/* Load the bitmap, keeping the bits per pixel of the file */
nRet = L_LoadBitmap (MAKE_IMAGE_PATH(TEXT("IMAGE1.CMP")), &LeadBitmap, sizeof(BITMAPHANDLE), 0, ORDER_BGR, NULL, NULL);
/* Multiply the colors of the bitmap with 1.51*/
nRet = L_MultiplyBitmap(&LeadBitmap, 151, 0);
nRet = L_SaveBitmap(MAKE_IMAGE_PATH(TEXT("Result.BMP")), &LeadBitmap, FILE_BMP, 24, 0, NULL);
Medical Web Viewer .NET
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