This topic reminds me of something I did a while ago.
Since a color negative film contains all the 'information' at a range of many stops, much more than any digital sensor, I had the idea of creating an 'HDR'
image from a single color neg frame.
The technique was to scan the same frame in different analog levels and merge them to an HDR image.
Then I realized that this is the same thing we used to do in color printing class, at photography school:
we exposed the highlights longer and the dark areas less.
This is the 'HDR' version of a negative frame.
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