Blackmagic Design Cintel Scanner Installations- Und Bedienungsanleitung Seite 123

5 The 'use OFX alpha' option will be activated automatically in the node's contextual menu to
enable the object removal plugin to use whatever key has been created within that node to
do its work.
6 Click the 'scene analysis' button, and wait for the analysis to finish. If the object you're
removing is moving but the camera is locked, you can turn on the 'assume no motion'
checkbox to improve your results in this case.
If your footage is ideal for object removal, the object will disappear once analysis
is complete, replaced by a seamless background derived from detail found on
neighboring frames.
The result after object removal analysis is complete
The object removal plugin is highly footage dependent, and you won't always get this good a
result this easily. Problems with the result are shown via gray, either gray fringing or solid gray
filling the replacement window. Gray shows you where the current settings are failing to find
background content with which to fill in the patch you're removing. If this happens, there are two
things you can try.
‚ If you notice while playing through the analyzed result that the object removal mask has
gray fringing on some frames, you can try adjusting the 'search range' slider, which is the
distance, in frames, from the current frame that the object removal plugin is searching for
replacement image detail. For example, if the search range is 20, it searches +/-20 frames
from the current location, or 40 frames total. The allowance of 10 frames means we look at
every 4th frame. You will generally get the best results for the smallest range that gives an
acceptable result.
‚ If you're noticing that the object removal mask is filled entirely with gray on some frames,
this means that background fill couldn't be easily generated for those frames. In this case,
you can try clicking the 'build clean plate' button, which takes a 'best guess' approach to
generating a background with which to fill the frame and integrates this with frames that
could be successfully filled in.
‚ If the patch is successfully filled, but the result isn't blending well with the background, you
can try changing the blend mode. The default is 'linear', which is a simple cloning operation,
but you can also choose 'adaptive blend', which can provide better results except in certain
situations where the edges of the replacement patch have a different color or brightness
than the background.
‚ The 'scene mode' menu provides different methods of analyzing the scene, for improving
the analysis of how the area that needs to be replaced moves, to best determine how to fill
the hole left by the object being removed. Background analyzes the entire image except
for the object region. Boundary analyzes the boundary area surrounding the object region.
Object is for analyzing an object that moves with the background, like a sticker that's on a
window while the camera moves.
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