Primary Color Correction: Color Manipulation Tools - The Art and Technique of Digital Color Correction - page 153

Fig. 4.70 Avid Symphony Channels interface.
color corrections, but it can save you—if you have access to a Channels-
like interface ( Figure 4.70 ) —for some really nasty corrections. There are
two main situations where I find myself turning to Channels. The first
is when a color channel is completely missing or is almost completely
missing. Sometimes this happens on multi-camera shoots, where a single
color channel gets shorted out going to the iso deck. The camera seems
fine going into the switcher, but not the iso deck. I can try to fake the
missing color channel using Channels.
I also use Channels with very noisy video. Nine times out of ten, the
noise primarily resides in a single channel. By reducing the strength of
the noisy channel and mixing it with the cleaner channels, I can take out
the noise.
You should know that Channels is only going to get you so far in sav-
ing things. In almost every color correction that I start in Channels, I have
to use other tools to fix what I broke in the image.
I'm not going to get into a detailed explanation of this tool because
very few applications have it. What I did above was to look at what
was wrong with a given channel and try to correct it by reducing the
percentage of the problem channel and mixing it with a percentage of a