Dendrobatid From United Kingdom, joined Nov 2004, 1648 posts, RR: 62
Reply 3, posted (7 years 3 weeks 21 hours ago) and read 1798 times:
AIRLINERS.NET CREW HEAD SCREENER
The contrast is too low. If you look at what you should expect to be the blackest of blacks, it is not, it is a smoky dark grey.
Using levels I suspect a small gap at the left of the histogram. Pull the left slider in a lttle and I am certain that it will improve. Alternatively, as Garry suggests use the curve to the same effect