[Insight-users] more efficient way to set pixels than SetPixel() and GetPixel() from RGBImage

[danieljohnsonusa at netscape.net]

I'm developing an application using itk libraries where I need to set 
Pixels in regions of a 3D MRI image.  I started by building an 
application that based off of RGBImage where I use the SetPixel command 
 from the itk libraries, but I noticed in the code that there is a 
comment stating that SetPixel()}and GetPixel() are inefficient and 
should only be used for debugging purposes.  However, I've looked at a 
few other examples and have had a hard time finding the portion of the 
code where pixels are set.  For example, I've been studying the 
DiscreteGaussianImageFilter in the itk libraries but I've had a hard 
time finding the part of the code where individual pixels are set.  I 
would greatly appreciate if someone could help explain to me where in 
the code for filters like the DiscreteGaussianImageFilter that 
individual pixels are set so I can find a more efficient way than the 
SetPixel and GetPixel functions from RGBImage.


Thanks,

Daniel