Automatic Dirt Removal
The Automatic Dirt Removal plugin uses optical flow technology to target and repair temporally
unstable bits of dust, dirt, hair, tape hits, and other unwanted artifacts that last for one or two
frames and then disappear. All repairs are made while maintaining structurally consistent detail
in the underlying frame, resulting in a high quality restoration of the image. Fortunately, despite
its sophistication, this is a relatively easy plugin to use; just drop the plugin on a shot, adjust the
parameters for the best results, and watch it go.
(Left) Original image, (Right) Using Automatic Dirt Removal
NOTE This plugin is less successful with vertical scratches that remain in the same
position for multiple frames and is completely ineffective for dirt on the lens that
remains for the entire shot.
Main Controls
The primary controls used to adjust how much dirt is removed from the image.
Motion Estimation Type: Lets you choose from among ‘none’, ‘faster’, ‘normal’, and
‘better’. This tunes the tradeoff between performance and quality.
Neighbor Frames: Lets you choose how many frames to compare when detecting dirt.
Choosing more frames of comparison takes longer to process, but usually results in
finding more dirt and artifacts.
Repair Strength: This slider lets you choose how aggressively to repair dirt and
artifacts that are found. Lower settings may let small bits through that may or may not
be actual dirt, while higher settings eliminate everything that’s found.
Dirt Size Threshold: This slider lets you tune how large a detected bit of dirt must
be to be removed. Raising this parameter lets you omit things like film grain from the
operation but may allow smaller bits of dirt through.
Show Repair Mask: This checkbox lets you see the dirt and artifacts that are detected
by themselves, so you can see the effectiveness of the results as you fine tune this filter.
Fine Controls
These controls let you fine tune the effect in an effort to perfect the tradeoff between removing
dirt successfully and preserving true image detail.
93Automatic Dirt Removal
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