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LBitmap::ApplyMathLogic

#include "ltwrappr.h"

virtual L_INT LBitmap::ApplyMathLogic(nFactor, uFlags)

L_INT nFactor;	operation factor
L_UINT uFlags;	flag

Performs specific mathematical or logical operations on the colors of a bitmap.

Parameter	Description
nFactor	Mathematical or logical operation factor.
uFlags	Flags that indicate the channel that will be used, the treatment of the input pixel values, the mathematical operation, and the treatment of the output pixel values. Use a bitwise OR ( \| ) to specify one flag from each group. Refer to Flags for the LBitmap::ApplyMathLogic* Function for the list of flags.

Returns

SUCCESS	The function was successful.
< 1	An error occurred. Refer to Return Codes.

Comments

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 only in the Document/Medical toolkits.

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.

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

Calculating Master Channel Values

In order to speed up widely used image processing filters in LEADTOOLS, the grayscale value (master channel) of a colored image is calculated using the following formulas:

#define CalcGrayValue(r, g, b) ((L_UCHAR)(((L_UCHAR) (((2 * (L_UINT) (r)) + (5 * (L_UINT) (g)) + (L_UINT) (b) + 4) / 8)))) 
#define CalcGrayValue16(r, g, b) ((L_UINT16) (((2 * (L_UINT32) (r)) + (5 * (L_UINT32) (g)) + (L_UINT32) (b) + 4) / 8)) 
#define CalcGrayValue32(r, g, b) ((L_UINT32) (((2 * (L_UINT32) (r)) + (5 * (L_UINT32) (g)) + (L_UINT32) (b) + 4) / 8))

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.

Example

L_INT LBitmap__ApplyMathLogicExample(LBitmap *pLeadBitmap)  
{ 
    
   /* This example multiplies the colors using a factor of 1.51 */ 
   /* Multiply the colors of the bitmap using a factor of 1.51 */ 
 
   return pLeadBitmap->ApplyMathLogic(151, AML_OP_MUL| CHANNEL_MASTER| AML_VALUE_NOP| AML_RES_NOP);  
 
}

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Help Version 20.0.2020.4.5

LEADTOOLS Raster Imaging C++ Class Library Help

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LEADTOOLS Raster Imaging Features

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Classes and Member Functions

Summary of Features

Functions:	LBitmap::AdjustTint. LBitmap::ColorHalfTone, LBitmapBase::Combine, LBitmap::ChangeIntensity, LBitmap::GammaCorrect, LBitmap::ChangeContrast, LBitmap::HistoContrast, LBitmap::StretchIntensity, LBitmap::RemapIntensity, LBitmap::ChangeHue, LBitmap::ChangeSaturation, LBitmap::HistoEqualize, LBitmapBase::Fill, LBitmapBase::GetPixelColor, LBitmapBase::PutPixelColor, LBitmap::GetHistogram, LBitmap::WindowLevel, LBitmap::WindowLevelExt
Topics:	Raster Image Functions: Modifying Intensity Values
	Correcting Colors
	Raster Image Functions: Correcting Colors