I have a bunch of NEF images that I need to do some calculations with. I 
could just convert and save them all to some normal format with dcraw, but 
that will just take disk-space. I'd rather read them into Julia somehow. 
dcraw has an option to output the image to the pipe (dcraw -c filename), so 
I thought that since Images.jl's imread can read streams, maybe I can get 
it to work that way. Something along the lines of:

I = imread(readall(`dcraw -c "SHT_0001.NEF"`),PPMBinary())

But this doesn't work. Any ideas?

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