For a research project, I’m trying to code up the lightness/darkness of about 100 black-and-white headshots of people. All the photos are currently in PDF, but could be exported into any other format.
Does anyone know of software that would – say – code a white box as 0, a black box as 100, a box containing a picture of a lighter-faced person at 30, and a box containing a picture of a darker-faced person at 50? None of the regular Adobe programs seem to have such a feature.
I could do this by hand, but it would be much less precise.