CR2 Raw Sensor Replace

[segallis]

I'm new to GIT so apologies if this is the wrong way to communicate... I am working on several python scripts for astro-photography - dark frame optimization (really sensor mapping and noise reduction); dark frame subtraction; alignment & distortion correction; and image stacking. I realize there are lots of solution already, but I am try to implement some innovative signal processing techniques. My next step is to do as much as processing as possible at the raw sensor data level.

I have leveraged several other script to the point of getting raw Bayer sensor data into a 2D numpy array (I should mention that I am not yet a Python "expert"). From there, I am comfortable doing the image/signal processing I need to so. My end result is a modified 2D array with the "new" sensor Bayer data. Here is where I hit a wall.

I need to over-wite the modified sensor data into the CR2 file.

Ideally I would love few simple routines like:
raw_info = readcr2file('filename')
bayer_data = raw_info.get2darray
and
raw_info = overwrite(bayer_data)
writecr2file(raw_info)

I believe your code has everything I need, but I'm not quite sure which pieces I need and exactly how to go about making things happen. I really don't care about the embedded thumbnails, or anything other than simply overwriting the raw bayer sensor values.

Any direction would be appreciated.

-Greg