Best Filter to Use for Dark Video

Comments

DelCallo wrote on 4/24/2005, 3:58 PM
Your explanation was very clear. I just have to get better at using the keyframer.

One more question, if I may:

If I only wanted to add a touch of red to the skin tones in a scene, is the color selection dropper (the one on the right of each of the three pairs of droppers) the one to use?

I tried this, but it turns the entire scene red, not just the skin tones.

Any suggestions appreciated.

Caruso
BillyBoy wrote on 4/24/2005, 6:28 PM
There are many ways. What I do...

Drop on the Color Corrector filter. Assuming you are happy with the white and black points (do that first, see my tutorials) use the MID color wheel.

To warm up flesh tones move the control point on the Mid Color Wheel up and left roughly at midway between Y1 and R while watching the change in the preview window. To make skin tones cooler, move down and right between Cy and B.

The more you move towards the edge of the color wheel the greater the strength of the hue you're moving towards. I find this vastly superior then just using the Color Balance filter which is mainly a legacy filter to remove color cast.
DelCallo wrote on 4/24/2005, 9:01 PM
Thanks, Billy. I'll give that a try.
Caruso
QueenGeek wrote on 4/25/2005, 10:28 AM
Thanks to all who posted tips here. I replaced the brightness/contrast filter with color curves and wow! what a difference!!! Much better!
BillyBoy wrote on 4/25/2005, 1:15 PM
If you use Color Corrector FIRST, then if necessary Color Curves, you'll be even more impressed. <wink>

Remember:

Brightness/Contrast effects ALL pixels equally, so a sledge hammer approach.

Curves has the ability to move pixels from one region to another like shifitng more into midtones from shadows or highlights while not effecting areas you don't want to change.

Color Corrector should first be used to remove any color cast by setting black and white points using the eyedroppers on the low and high color wheels. Then adjust gamma, gain while viewing the scopes, then finish up nudging the middle color wheel to shift/add towards a hue if you want to warm up or cool down the scene. Lastly tweat color curves and you'll say WOW I never knew I was missing so much power to quickly and easily bring scenes into balance and bring out shadow and highlight detail.
Jøran Toresen wrote on 4/25/2005, 1:44 PM
BillyBoy and all others

I’ve played around with the colour corrector. I know the purpose of Saturation and Gamma. But for which specific purposes should one change the values of Gain and Offset? Or: what is the definition of Gain and Offset? (I live in Norway thus my English isn’t that good. Therefore it is sometimes difficult to understand the meaning of specific terms like the two mentioned above.)

Regards,
Joran

BillyBoy wrote on 4/25/2005, 3:30 PM
Gamma adjusts brightness or the luminance level. Lower setting will darken, higher brighten. This works similar to brightness/contrast in that EVERYTHING is effected equally. Gain effects luminance in a similar way. The offset adjustment tweaks the Gain setting. So you can ignore it. I typically will adjust both Gamma and Gain.slightly.

Before adjusting either, turn on SCOPES. I prefer the view where the Vectorscope, Waveform and Histogram are all visible at the same time.

Looking at the preview monitor (assumed external monitor if you project will be viewed on anything other than a computer in its final form)

Calling you attention to the Waveform. Toggle between Luminance and Composite view, note the waveform and the pattern. If working on a video, not a series of stills be sure the the option to update scopes while playing is enabled. Depending on source file you may be able to make better adjustments when viewing only luminance, other times just composite, sometimes toggle between the two.

Now...

S L O W L Y adjust Gamma and/or Gain while viewing the Waveform Scope and alternating between preview to get the best overall picture. The marking indicate the distribution. If you project for sure won't be broadcast over TV and you're only going to play a DVD off a TV then you can have the pattern SLIGHTLY higher than 100 IDE for the highest portion of the waveform. In a like manner watch the bottom range and keep it above zero. There is no "magic" spot. Every source video is a little different, Gain and Gamma interact and work in similar ways. Adjusting Color Curves will also effect the pattern, however you can see the effect of changes better looking at the Histogram scope.
Jøran Toresen wrote on 4/25/2005, 4:29 PM
Thank you Billy

It seams that the Gamma function moves the luminance level up or down in a proportional way, while the Gain function reduces or widens the “luminance range”, and that the Offset function defines the centre point from where the corrections are applied. But the adjustments made by both Gamma and Gain have to be within the allowed range for the luminance: 0 to 100. (I hope you understand what I’m trying to express.)

Joran