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Re: How to do colour correction quick so all interviews match (didn't white balance)

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Chris Wright
Re: How to do colour correction quick so all interviews match (didn't white balance)
on May 28, 2016 at 3:03:30 am

if i understand your post correctly, you tried premiere's fast color corrector with white balance eye dropper but it didn't match well enough. and later, you had various exposures you need to match up? Is that right?

you can try speedgrade via dynamic link with shot matcher which will match with one easy click.


click wrench-enable reference monitor with yuv/hls/rgb scopes
and use fast color corrector to match up black point, white point, gamma, contrast, saturation, and hue.

the basic idea is first match all clips to each other called a "one light" where everything is conformed out of RAW and looks similar.
Then a coloring stage to get the artistic look which can be almost anything. color, contrast, saturation, like magic bullet mojo or Technicolor. Basically the feel you want to convey. Here is a simple 3 step process to initially match all the editing clips to a standard candle in premiere, although it should be pretty similar in any NLE with scopes. Remember to calibrate your monitor so that you get a consistent look.

-A Quick How-To-Guide for matching all clips to a standard waveform in 3 easy steps in Premiere.

Before you begin, open up vectorscope HLS, vectorscope YUV, and Waveform type luma

-add effect fast color corrector to clip
1. View waveform luma:
using effect fast color corrector:
set black point ire 7.5
set white point ire 90
if black and white points are already maxed out, set output level so they are set.

for grey point(the middle slider), view HLS vectorscope, make as small a dot as possible, increase just until you see other parts increase. a large part of shadow will also automatically match 30% on the waveform luma. You'll find this also creates a consistent slightly Log look so its easier to grade and match later on.

2. White balance(click white balance eye dropper) or... if you can't find a white spot, temporarily set saturation so that it all fits inside HLS vectorscope. Watch the HLS vectorscope so that the large Hue wheel sets the weighted brightest part in the center.

There's a secret trick to get all skin tones to match and thus a faster color match between shots, the "skin tone line".

Temporaily set Saturation 200% to easily see bright saturation line.
Set -Fast color corrector-Hue Angle - line up brighest line in HLS(not YUV) vectorscope between where line red and yellow would be in the YUV vectorscope(around 11:00 o-clock). This is the overall Hue angle for skin tone.

3. Set saturation in fast color correctior to 90% of YUV vectorscope edge from center(100% is touching sides) so all clips have same saturation.
you've now perfectly matched black point, white point, contrast, gamma, saturation, hue in like 10 seconds per clip. And the best part is, they're all easily gradable.

a tip:
don't forget to keep an eye on your histogram for any sharp spikes, this means your footage is probably 8 bit and you could introduce quantization errors into your grade.

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