Re: Fast way of splitting an image into bit planes ?

That C2P stuff is well worth understanding.

However, it's tuned for CPU cycles, not performance on machines with 
caches. What you have to do is to split your working-set of data into a 
****tion that fits nicely into the data-cache. Check your algorithm 
target platform and try to do your processing in blocks of 64x64 pixels 
or so.

You will see an huge speed improvment simply due to better cache usage.