Image input

Hello,

Could you clarify the format of the 'raw' input?

Currently I would like to perform denoising on some images from a camera which are in dng format. I'm able to convert dng to exr but I'm unsure of how to obtain the histogram and coverage files. I then attempted to use raw2bcd but then am unsure what format the input should be in.

I appreciate any advice you could provide.