Instruction manual

Previous DeckLink Cards – Installation & Setup
59
Lookup Tables (LUT’s) in DeckLink HD Extreme 2 for Windows
DeckLink HD Extreme 2 can use 1D or 3D LUT’s during playback. Lookup tables can be used for standard
definition and high definition video as well as 2K film.
1D LUT’s are useful for altering the brightness of an image but do not affect color. They are often used when
working with log video so that the image can be displayed on screen as normal linear video. Built-in 1D
LUT’s are provided for log to linear conversion when playing video captured from Panasonic Cinegamma
™
and Viper Filmstream
™
cameras.
3D LUT’s provide the ability to increase and decrease the amount of color in each color channel,
independently from brightness. This allows for precise color grading to ensure a video monitor matches
the color printed to tape or film.
How to use Lookup Tables in DeckLink
When the System Preferences are opened to access the DeckLink lookup table settings, your broadcast
monitor will usually stop showing any video being played and instead will show an extended desktop. It
is possible to replace the extended desktop, with the last played frame of video, so that adjustments to
lookup tables can immediately be seen on the frame of video.
To use this feature, open the Blackmagic Control Panel. Under the Settings tab, look for, “When not playing
video, send ... to all the video outputs.” This setting is usually set to Extended Desktop or Black depending
upon your personal preference. Switch it to “Last Played Frame” and then restart the computer.
After the computer has restarted, use your preferred video software application to play some video. The
last played frame of video should remain on your broadcast monitor. Open the Blackmagic Control Panel
and then click on the Processing tab. A Lookup Table button is available for output processing and this
can be used even when all other processing functions are set to “Off”. Click on the output Lookup Table
button and then activate the Enable Lookup Tables checkbox.
The lookup table interface in DeckLink can be adjusted using a method similar to that used for image
adjustment with the Curves feature in Adobe Photoshop
™
. The horizontal axis of each graph represents
the original color input values and the vertical axis represents the new colour output values. When first
opened, each lookup table displays a straight diagonal line because the color values have not yet been
changed.
Changes made to the lookup tables can immediately be seen on all SDI, analog and HDMI outputs of
the DeckLink card. Changes are saved to the DeckLink preferences by clicking the OK button. Lookup
tables can be reset to original values by clicking the Reset Unity button. Lookup table processing can be
disabled by deselecting the Enable Lookup Tables checkbox.
Enable Last Played Frame.
Click on the Lookup Table button.