SteveR wrote:
Don't denigrate p/p so quickly. The simple acts of cropping, straightening or brightening do not markedly affect the true nature of a photograph, but are, indeed, post processing, yet I don't believe that they affect "reality." Did you shoot in film days and have your photos developed? Ever see the numbers on the back of a photo? Those were the post processing changes done prior to printing.
The DRGB settings on the back of photo were the printer lamphouse settings. They were determined with some sort of color negative analyzer, densitometer, or other measuring device. They were unique to the conditions in that lab at that moment with that negative. Reprints made at a later date with those same settings seldom matched the first print, but would be close. So the re-analysis for a reprint would start there.
Those numbers roughly correspond with Exposure and White Balance settings in post-processing software. All else was determined with film manufacture, exposure, lighting, film processing, and paper choice.
We have several orders of magnitude more capability in modern software than we ever did with our tools of the film era!