brutal lighting -- any remedy?

s k r o o t a y p wrote on 1/20/2008, 8:50 PM
~ i know this is an age old tough problem. the dilemma is that the performer in the video steps in and out of brutal lighting at random. the contrast and brightness have been adjusted to look right for the 75% of the time that the performer is not under the brutal lighting. is there anything else worth trying to play down those scorching white patches that fall on the subjects head and shoulders?

thanks!

Comments

Eugenia wrote on 1/20/2008, 9:05 PM
If you already played with brightness/contrast and color correction plugins, then no, there's nothing else you can do. You could have used a gray card to get the right exposure during the shooting, or manually under-expose on purpose, but other than that, there's nothing you can do on post processing.
s k r o o t a y p wrote on 1/20/2008, 9:10 PM
~thought i'd ask : ) thanks
MIKE P wrote on 1/21/2008, 7:32 AM
Eugenia- can you talk more on what you mean by the gray card (which I assume is for setting white balance), or else point to some web resources on the topic?
Paul Mead wrote on 1/21/2008, 12:03 PM
Go into the Color Curves effect and drag the brightest (top right) part down. That will darken the highlights. I you want to reduce the contrast for a certain light level double click on the curve to create a point in the curve that is in the middle of the brightness range for your subject (you can experiment to find that point) and then use the handles to reduce the slope of the curve in that brightness range. That will provide a smoother, more gradual and natural looking, contrast. Also, don't forget that you can use keyframes to adjust the levels as the primary subject moves in and out of the light.

I really don't know how to explain it better than that, but if you play with the curves I think you will see what I mean. Also, take a good look at the help topic for that effect, it has examples of ways you can manipulate the curves.
Eugenia wrote on 1/21/2008, 1:52 PM
Paul, if something is completely washed out, there's no recorded information to recover, and using curves won't help much.

Mike: the grey card also sets the exposure, not just the white balance (as long as you are in non-auto mode in the camera).
Paul Mead wrote on 1/21/2008, 3:27 PM
Yes, that is true, Eugenia. But often there are a fair amount of pixels that aren't 100% white, and you can bring them out by dropping the upper part of the curve. The results aren't great, but if you don't have the opportunity to do it all over again then it is better than nothing.

Of course this brings up the whole topic of lighting in general, and how to expose when you don't have great light for video, a big world all in itself. Quick and dirty, if you don't have a grey card and you can get close enough to zoom in on a hand, have someone hold up the palm of their hand under the "typical" lighting condition, and set your exposure based on the palm. That should give you a reasonable exposure. The ethnic background of the subject typically doesn't make a big difference; most palms are pretty close.
studioLord wrote on 1/23/2008, 6:16 PM
There are a couple of other options.... 1. Cut out some "like video" clips and pass them thropugh at the points where the 'white patches' come in. Using your transitions along with the "cut outs" give it an 'extra camera' effect that works in some cases. If it's right at the most important lyric of the song, it can get tricky, but I've used the "cut outs" before to remedy that problem. 2. you can use stills as a "relief". They stop the action in a dramatic way and if used in the right lighting can be very unusual for the viewers. There again, if the lyrics are "in the way" you have a problem, but if the places are where you can "insert" some changes to the continuity, then you can 'fix it'
Hope this helps
John
ekez wrote on 1/30/2008, 1:40 PM
Folks,
I 've got a simple problem with Flash Photography at a wedding. Apparently the frames with the over exposure flach accents can be adjusted with Brightness/contrast.
mickbadal wrote on 2/1/2008, 11:06 AM
I realize this may sound naive, but what the heck I'll give it a shot...how about using chroma keyer on the track, setting the "white wash out" area as the mask so that it shows through to a duplicate of the video beneath that is set slightly out of phase using pan/crop, so that similar color/tone that surrounds those "white washed out" sections is brought through? Possibly then use some blurring to soften edges, etc.

I realize this will only work if the areas are small and not on features such as eyes/ears/etc, but since you said the areas were "patches" that fell on parts of the subjects head & shoulders, I thought i'd throw it out there.