Dendrobatid From United Kingdom, joined Nov 2004, 1727 posts, RR: 58
Reply 3, posted (8 years 8 months 23 hours ago) and read 2168 times:
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