I'm a coast and mountain kind of guy. I spent a week in North Dakota last summer and found I lost my sense of direction very easily, particularly on very cloudy days. I was grateful for the compass readout in my truck. In such conditions it was startling how grain elevators and similar structures took on enormous perceptual importance. Structures that I would normally pay little attention to became extraordinarily important as landmarks and waypoints in an otherwise nearly featureless landscape. It's a very good case of how relative contrast plays a critical role in human perception. How did you do the color restoration?
Mostly by the highest value = 'white' and the darkest value = 'black' -- then fine tuning Some of us call it the "Ozone System"