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The DV Rack Components
The Waveform Monitor Settings
All of the Waveform modes except for Luma display video information from left
to right. The far left portion of the waveform corresponds to the far left portion of
the video etc. Luma is a “Histogram” mode that displays brightness information
in a different way. Dark values are displayed on the left side of the scope, and
white values are displayed on the right. This is similar to the way graphics
software like Adobe® PhotoShop® represents brightness. If there’s a peak on the
left side of the scope, that means the video is mostly dark.
Example
: Use the Luma mode to check lighting and camera settings. Try to get a
nice gentle “hump” in the middle of the scope. Then, use Y mode to double-check to
see that there isn’t any area of the video that is too bright.
R-Y and B-Y have specialized uses. You may want to use them in conjunction with the
Vectorscope to adjust a camera on a green screen shoot. If you know what the
R-Y and B-Y values should be for a certain camera viewing a particular scene, you would
be able to dial in a second camera, and get results similar to the first camera.
Using the Waveform Monitor to check for dark and bright areas
1.
Turn the
Illum
. dial to the left or right until you see the orange scale clearly.
2.
Turn the
Intensity
dial until you can clearly see the green signal.
3.
Point your camera at the image you’d like to analyze and examine the green
video signal for appropriate dark and light ranges as you make changes to
the camera or lighting.
The Vectorscope
Y
– Displays the brightness value of the video signal. Signals at
the bottom of the scope are black, and signals at the top of the
scope are white.
Parade
– Shows all 3
component signals at once;
Y, B-Y, R-Y.
R-Y
– Shows just the red
channel.
B-Y
- Shows just the blue
channel.
Luma
- A “histogram” mode. (See
description below.)
Red
Magenta
Blue
Cyan
Yellow
Green
