10 bit packed as 8 bit unpacking

[dmarshall(at)ivory.trentu.ca]

I would like to get the raw information from a 1280 by 960 image that has 
10 bit resolution. I can get at a dumped version that comes out in 8 bit 
chunks.

Could I read the image into a bytarr and "simply" reformat it as 10 bit?

Any bones thrown, greatly appreciated.

Dave.