Slightly OT: Help w/Colour Correction

mjroddy wrote on 11/22/2004, 9:11 PM
Ok. I know I sound like a dunderhead with this quest. But I figure the dumbest question is one you already know the answer to, so hear goes:
What - is colour correction.
I mean, I know that when your whites are off or you know what a colour should be, you can try to add or subtract colours to get a desired result. I after reading so many posts here, where colour correction and "real time colour correction" are among the most important things in editing.
I aim for good field footage. I white ballance any time the light changes. (Actually, I Warm Ballance using the wonderful Warm Cards.) I know that all the pros out there do the same, so I know that colour correction isn't what I think it is. I also know that it's a film term, so I'm GUESSING that it has something to do with punching up the values to make the colours stand out more?

Comments

mjroddy wrote on 11/22/2004, 9:14 PM
(Um... WAY off topic: How come I can't edit my posts? I get "Error on page.")
NickHope wrote on 11/22/2004, 11:38 PM
No matter how well you try and white balance etc., sometimes the footage will just not look how you need it to. So then you need to colour correct or colour "improve". As far as I know colour correction is not a "compulsory" process. And in fact you are probably more likely to have to reduce the saturation of colours in post to meet NTSC limits than to pump them up.
PeterWright wrote on 11/23/2004, 1:20 AM
I agree - white balance whenever possible when shooting, but sometimes we get caught , and Colour Correction, and C/Curves are wonderful tools.

Yet, apart from comparing differences, I still don't really know what I'm doing between using the Choose Adjustment Color or the Choose Complimentary Color eye dropper.

Appreciate any clarification...

p.s. I just edited this ok, mjroddy
NickHope wrote on 11/23/2004, 2:22 AM
With the choose adjustment color you're picking a color and amplifying it. With choose complimentary color you're picking a color and reducing it by adding it's opposite (complimentary color). In color correction I use the complimentary eyedropper most times and I don't think I've ever called on the adjustment color eyedropper because I'm normally REMOVING color casts.

The trick with the complimentary eyedropper is to find something within the tone band (low/mid/high) that should have been neutral in real life and then pick on it to neutralise incorrect coloration within the band. If there is nothing in the pic that would have been neutral then you've got to pick the next best thing and then eyeball it from your real-life experience. Also remember that the tone bands overlap so for example correcting the mid tones will also affect the low and high tones somewhat.

There's no right way of doing these procedures, and Vegas has so many different effects now that it's possible to achieve the same effect with a whole variety of different tools.

Billyboys tutorials are a good starting point: http://www.wideopenwest.com/%7ewvg/tutorial-menu.htm
craftech wrote on 11/23/2004, 8:24 PM
Take pains to sample the blacks and the whites with the eyedropper and the rest will be a lot easier. You may have to do it several times before you get an accurate sample. Enlarging the still frame a little bit will help before you take the eyedropper sample. Split the video up into as many segments as you need if the lighting is changing a lot within the video.

John
patreb wrote on 11/23/2004, 10:03 PM
Besides "simple" matching footage you can take in really great areas where you just play with the original footage and get really chelenging results. All the care in shooting and you will still want to use CC to enhance the stuff.

I think none of my films on this page:
http://www.patrykrebisz.com/films.html

were non-color corrected.
NickHope wrote on 11/24/2004, 11:50 AM
When you're picking the complimentary colour for your lowlights and highlights, don't necessarily go for the very darkest or lightest areas of the frame because these may be so close to 100% black or white already that they don't give you enough of the complimentary colour you need, or even the correct complimentary colour. In particular avoid picking on a light source in the image (lamp, candle, sun) or a bright reflection of a light source.
mjroddy wrote on 11/24/2004, 12:21 PM
patreb,
Why am I not getting any audio on any of your vids? I'm getting computer sounds, so I know my speakers/audio card is fine and other video files work swell. Your site and all files are silent for me. Is it something I'm doing wrong or don't have set correctly?