December 23, 2012

Getting Started with Color Correction: Using Waveforms and Scopes with Colorist Steve Hullfish

The colorist's job has gotten a whole lot easier since chemical baths stepped out of the picture in many cases. Non-destructive color timing is the future in which we now live -- that said, the principles at work in creating properly balanced imagery is as important as ever. Each camera we may be shooting on has its own unique implications in chromatic reproduction, and the ability to delicately correct a given color mixture (regardless of its source) is key. Ironically, or not, tools such as waveform monitors and vectorscopes -- staples of the bygone analog video world -- are as relevant today as ever in filmmaking, if not more so. A recent presentation by noted color correction author Steve Hullfish demonstrates precisely this point, as well as the basics in using your scopes to full advantage.

The video, originally posted by The Editors' Lounge, is a great launch pad for those just getting into color correction. It's also helpful to anyone who appreciates straightforward and solid refreshment regarding grading's integral tools and techniques. As a bit of a key to those who may at first be confused by the multiple screens shown, the primary monitor (upper left of video thumbnail) mirrors Steve's Avid interface, while the secondary screen displays a feed directly from a waveform monitor/vectorscope by Tektronix, itself providing a readout straight from the given 'in view' Avid clip.

There's a few important basics to keep in mind if you're not someone used to staring at a waveform monitor, or a waveform monitor-type RGB parade. As Steve well explains, this type of scope uses its dimensions in a way that may be non-intuitive -- left to right matches your frame visually, whereas the y axis plots each luminance value hit at that horizontal point in the frame.

Furthermore, keep in mind that the 'intensity' diplayed for each of these luminance points acts like a third dimension of the graph, showing you how much a certain luminance value is hit, in total, along the vertical line determined by your horizontal position. If that sounds confusing, think of a globe and what longitude and latitude mean -- latitude measures laterally even though the lines themselves are vertical, and vice-versa. This contrasts, for example, with the histogram (NTBC with Instagram) -- which aims to chart similar information, but in a different way. A histogram is actually two-dimensional, and charts dark-to-bright luminance values left to right (respectively), with the y axis indicating the overall frequency at which a given luminance value occurs within the entire frame. These differences are illustrated by the image at left (courtesy Toolfarm), in this case in After Effects.

Filmmakers on a budget, and the kind that also do their own grading, may be a bit dismayed by Steve's emphasis on using a real scope instead of the virtual versions already within or available for your NLE. Many of us who are not colorists alone won't be able to justify such a purchase -- but as non-fulltimers, we'll probably be fine using the scope emulators in our software anyway. It's mainly a matter of speed and efficiency, but spendthrifts can still grade aplenty if they're okay with un-clicking to let the scopes render the changes you make. Again, the same principles apply, and that's how you'll be able to match, in color balance at least, footage from just about any given source.

How many of you out there use real scopes to grade, either by ownership or access to facilities that include them -- and do you find this to be a smoother and simpler grading experience? In software, do you prefer using curves, color wheels, or sliders to input your color corrections? What scopes do you find yourself relying on the most within your grading software?

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[via FilmmakerIQ]

Your Comment

19 Comments

this was a great post, thanks!

December 23, 2012

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Fernando

Very informative. Does anyone have experience with Autodesk Smoke?

December 23, 2012

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ThunderBolt

Great post,

I want to be as comfortable color correcting video as I'm in still photography and any resources that help with that I find very useful!

December 23, 2012

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aaron G

I saw a thread elsewhere recently and several people recommended this as a good reference book:

http://books.google.co.uk/books/about/The_Color_Correction_Handbook.html...

December 27, 2012

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chris

Steve Hullfish also have his own book

January 8, 2013

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Victor Nguyen

Definitely use the waveform monitor the most...

December 23, 2012

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Hey, looks like this was at Techserve here in NYC! :)

December 23, 2012

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This is really cool. Thanks for posting this. While I do some color correction/grading, I kind of glossed over this in school because our instructor didn't really cover it. He kind of eyeballed it with us. This is going to help out tremendously.

December 24, 2012

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DIYFilmSchool

THANKS FOR THIS POST!

December 24, 2012

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MRGABE

Very very interesting. Thanks a lot. Love it.

December 25, 2012

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This doesn't seem to be a post a lot of people have got excited about, judging by the number of comments, but as an editor needing improvement in my colour correction, I'd recommend this. Some stuff I knew; but some pearls of wisdom I didn't, and wouldn't have thought of otherwise. Thanks!

December 27, 2012

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Adrian

Really cool post, thanks!

I especially like the care that Steve takes in the video to explain exactly what he's doing, and why he's doing it, and what he's looking at.

This is great resource!

December 27, 2012

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I wish I had some external scope, but I normally I just look at the histogram in the levels (poor mans scope?)
Or load Color Finesse (when I am in after effects)

This helped me allot. We have the book that steve wrote, and it is really great.

The more I work with color grading the more I feel that I don´t know, the more I learn the deeper the well gets.

December 28, 2012

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When I am editing and need to adjust white levels and/or match different shots, I often just use the pipette tool in the FCP three way color correction filter and then maybe adjust it a little more until I like what I'm seeing.

It is a really quick and dirty way to white balance and match pictures, most of the time you only need to use the pipette tool in the highlights and then maybe adjust the mid-tones a little.

I realize this is very quick and dirty, but it is very effective for news work and stuff that needs to get done without a seperate budget for color grading.

January 2, 2013

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Heiko

Wow.. That was fantastic!!!!!! Very Helpful

December 28, 2012

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Definitely helpful!

December 28, 2012

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Nice article about scopes... after searching high and low for about two years, this post was the best I have seen. It was direct and had samples to view the cause and effects, and what your looking at.

Keep these priceless (valuable) lessons coming.

December 31, 2012

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Cal

god, all new films look so fake and colors look awful

October 15, 2013

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idaho

For more videos of Steve Hullfish - visit this YouTube Channel:

http://www.youtube.com/user/TektronixVideo

January 16, 2014

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Richard D