🚀 go-pugleaf

In article <7328a61a.0310092311.7ba03fa1@posting.google.com>,
 heroin_c@hotmail.com (wall) wrote:

> I use this code selected the rect which has red eyes.
> 
> // the selected rect which has red eye
> // the selected image part GWorld - theSelectImageGWorld
> LGWorld*	theSelectImageGWorld = NEW LGWorld( theSelectRect,32 );
> ThrowIfNil_( theSelectImageGWorld ); 
> 
> // the orignal image GWorld - theImageGWorld
> PixMapHandle	theOPixMapH = ::GetGWorldPixMap(
> theImageGWorld->GetMacGWorld() );
> PixMapHandle	theSelectPixMapH = ::GetGWorldPixMap(
> theSelectImageGWorld->GetMacGWorld() );
> Ptr theOBaseAddr = ::GetPixBaseAddr( theOPixMapH );
> Ptr theSelectBaseAddr = ::GetPixBaseAddr( theSelectPixMapH );
> short  theORowBytes = ::GetPixRowBytes( theOPixMapH );
> short  theSelectRowBytes = ::GetPixRowBytes( theSelectPixMapH );
> 
> ::LockPixels( theOPixMapH );
> ::LockPixels( theSelectPixMapH );
> {
> 	Ptr		theSrcPtr, theDstPtr;
> 	for(short theY = mSelRectToImageOrignal.top; theY <
> mSelRectToImageOrignal.bottom; theY++)
> 	{
> 		theSrcPtr = theOBaseAddr + theORowBytes * theY;
> 		theSrcPtr += mSelRectToImageOrignal.left << 2;
> 		theDstPtr = theSelectBaseAddr + theSelectRowBytes * ( theY -
> mSelRectToImageOrignal.top );
> 		for (short theX = mSelRectToImageOrignal.left; theX <
> mSelRectToImageOrignal.right; theX++)
> 		{
> 			* ((long*) theDstPtr++) = * ((long*) theSrcPtr++);
> 			* ((long*) theDstPtr++) = * ((long*) theSrcPtr++);
> 			* ((long*) theDstPtr++) = * ((long*) theSrcPtr++);
> 			* ((long*) theDstPtr++) = * ((long*) theSrcPtr++);
> 
> 		}	
> 	}		
> }
> ::UnlockPixels( theOPixMapH );
> ::UnlockPixels( theSelectPixMapH );
> 
> what can I do to removing red eye in the selected image part?

I should add that you may want to leave a pixel alone if its red value 
does not exceed some high threshold. This will prevent discolration of 
the iris's inside the boundary. You could precalculate the threshold by 
histogramming the contents and looking for a sharp increase in the value 
of the red channel. Or you could use a fixed value.

Chris.