Autodesk 64006-051108-9001 User Guide - Page 81

Black Restore and White Restore, Hue

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The Adjust Tab 73 Black Restore and White Restore The Black Restore and White Restore filters in the Adjust tab let you set the level at which all pixels become completely black or white, as well as control the smoothness of transition between the restored and unmodified areas. Using this adjustment may improve encoding, but generally this feature is used to improve the subjective quality of NTSC and PAL video to be displayed on a computer monitor. The maximum black value of NTSC and PAL video formats looks black on a television screen, but computer monitors display these pixels as dark grey. Similarly, pixels that look white on a television screen are displayed as light grey on computer monitors.Using the restore feature can make these values truly black and white without altering the rest of the image. This is particularly useful for credits and titles on black or white backgrounds. Note: The full white produced by White Restore may be too bright in some cases, so avoid using it on white backgrounds unless you are trying to match the video with a pure white background. Both the Black Restore and White Restore filters have two controls: the Amount slider and the Smoothness slider. The Amount sliders control the point after which all pixels are forced to 100% black or white. The higher these values, the more pixels in the image that are restored to black or white. Experiment while using the Dynamic Preview to find the best value for your video. After you determine the optimal setting for the Amount sliders, experiment with the Smoothness sliders. For the best results, set the Amount sliders first, then the Smoothness sliders.These sliders control to what degree pixels near the transition between restored and unmodified areas are darkened or lightened. Altering these pixels helps smooth the transition. Higher Smoothness values produce a smoother transition, but affect more pixels in the image. As with the Amount slider, using the Dynamic Preview while experimenting is the best way to determine optimal settings for your material. Hue Changing the hue alters the overall color balance of the image and is often used to compensate for slight color shifts introduced during the capture process. Generally, this is only a problem with sub-professional analog formats; component analog and all digital formats don't have problems with color shifts. You can also use Hue to correct for source that is incorrectly white-balanced.

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The Adjust Tab
73
Black Restore and White Restore
The Black Restore and White Restore filters in the Adjust tab let you set the level at which all
pixels become completely black or white, as well as control the smoothness of transition
between the restored and unmodified areas. Using this adjustment may improve encoding, but
generally this feature is used to improve the subjective quality of NTSC and PAL video to be
displayed on a computer monitor.
The maximum black value of NTSC and PAL video formats looks black on a television screen,
but computer monitors display these pixels as dark grey. Similarly, pixels that look white on a
television screen are displayed as light grey on computer monitors.Using the restore feature
can make these values truly black and white without altering the rest of the image. This is
particularly useful for credits and titles on black or white backgrounds.
Note:
The full white produced by White Restore may be too bright in some cases, so avoid using
it on white backgrounds unless you are trying to match the video with a pure white
background.
Both the Black Restore and White Restore filters have two controls: the Amount slider and the
Smoothness slider.
The Amount sliders control the point after which all pixels are forced to 100% black or white.
The higher these values, the more pixels in the image that are restored to black or white.
Experiment while using the Dynamic Preview to find the best value for your video.
After you determine the optimal setting for the Amount sliders, experiment with the
Smoothness sliders. For the best results, set the Amount sliders first, then the Smoothness
sliders.These sliders control to what degree pixels near the transition between restored and
unmodified areas are darkened or lightened. Altering these pixels helps smooth the transition.
Higher Smoothness values produce a smoother transition, but affect more pixels in the image.
As with the Amount slider, using the Dynamic Preview while experimenting is the best way to
determine optimal settings for your material.
Hue
Changing the hue alters the overall color balance of the image and is often used to compensate
for slight color shifts introduced during the capture process. Generally, this is only a problem
with sub-professional analog formats; component analog and all digital formats don't have
problems with color shifts.
You can also use Hue to correct for source that is incorrectly white-balanced.