I am going to take a few photos of hardware for documentary purposes; unfortunately the only light available is monochromatic (think of low pressure sodium-vapor lamp). This is not really a big problem as the images should be in black/white anyways for easy printout in a manual.
This got me thinking about the DNG => monochrome image process.
In a normal develop process (on the technical level) you would take the DNG, demosaic it by interpolating the two missing colors per pixel. Then you filter/desaturate these pixels by doing some calculations with all three color values.
This inevitably mixes some information of all the sensor readings from surrounding pixels into one, which I think is not necessary to reconstruct a black/white image from the readings when taken under (almost) monochromatic light.
What I imagine can be done instead is: Take each sensor reading, multiply it with a factor (or maybe something logarithmic must be done) that corresponds to its sensitivity for the given monochromatic light source. With this you should be able to reconstruct a black/white image with more details.
Is there a program available that can do that (windows or linux is fine)? Or can I simulate that somehow with lightroom/adobe raw?
(please also tell me if this idea is totally nonsense and this would not at all preserve a little bit more detail)