How to Make an Inverse Effect of the Image?
How To Make An Inverse Effect Of The Image?¶
Introduction
If you want to make an inverse effect of the image, you can try this algorithm. To make a similar a negative (of a photo). That would be fun.
Equipment
Operation System: Microsoft Windows 7 Professional (64 bit)
Development Utility: Microsoft Visual Studio 2010
Usage
// The height of the image.
for ( int iY = 0; iY < imageA->DibInfo->bmiHeader.biHeight; iY++ )
{
// The width of the image.
for ( int iX = 0; iX < imageA->DibInfo->bmiHeader.biWidth; iX++ )
{
// The index of pixel of image.
lIDXA = ( iX * 3 ) + ( iY * imageA->DibInfo->bmiHeader.biWidth * 3 );
// Get value of blue channel.
byteRGB_BA = imageA->DibArry[lIDXA+0];
// Get value of green channel.
byteRGB_GA = imageA->DibArry[lIDXA+1];
// Get value of red channel.
byteRGB_RA = imageA->DibArry[lIDXA+2];
// The index of pixel of image.
lIDXB = ( iX * 3 ) + ( iY * imageB->DibInfo->bmiHeader.biWidth * 3 );
// Inverse the value of blue channel.
imageB->DibArry[lIDXB+0] = 255 - byteRGB_BA;
// Inverse the value of green channel.
imageB->DibArry[lIDXB+1] = 255 - byteRGB_GA;
// Inverse the value of red channel.
imageB->DibArry[lIDXB+2] = 255 - byteRGB_RA;
} // for ( int iX = 0; iX < imageA->DibInfo->bmiHeader.biWidth; iX++ )
} // for ( int iY = 0; iY < imageA->DibInfo->bmiHeader.biHeight; iY++ )
Exception
There is a notice, if your bit depth of bitmap file are not 24 bits, you should change your bitmap files to adapt this program, or you could rewrite this source code to fit your bitmap format.
You have to install Microsoft SDK v7.1, because I include windowscodes.lib.
#pragma comment(lib, "windowscodecs.lib")
Reference
None.
Acknowledge
Thank you (Microsoft Visual Studio) very much for this great development utility.
