frank678 said:

This is trying out the idea of taking a snapshot of a still in vlc, then changing the settings and taking a second snapshot, then merging the two together. The idea behind it is to increase the range/depth of a single image by adding additional information to it.

Unless you are merging frames from different sources (for a particular reason), you will get nothing more than if you adjust that single frame. The problem is ... adjusting it by eye will not produce anything definitive. You must have a reference to guide you. For example, here are some numbers for luminance / red / green / blue (graphed, of course) for this capture:

The capture looks good, the graphs look good (nothing crushed or blown-out) ... but it's wrong. (BTW, has this snapshot been pre-edited? If not, the gapping in the R/G/B graphs indicates a capture problem.) Compare it to the 2006 DVD (or any other version of your preference) and let's start with the luminance:

'82 LaserDisc 2006 DVD

The LD capture is significantly brighter. From the graphs, it looks like a gamma adjustment is needed:

Sure enough, here, after using a 0.6 gamma adjustment to pull the brightness down (note it's new graph), it looks amazingly good. Further work (color correction -- green looks a little strong) should be much easier now.

Suggestion -- it would be better if you could start your capture with luminance closer to your target image (if possible). That means a lot of sample caps (from all over the movie), graphing, settings-twiddling, and recapping to find the sweet-spot(s) for your capture settings.