Difference between revisions of "UM:Dvo Effects Dvo Scratch"
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Revision as of 17:59, 25 July 2017
DVO Scratch processes vertical/continuous scratches.
These are typically those not being detected by dust/dirt removers, which are looking for random defects in the picture. The process is fully automatic and has an advanced detection algorithm with a fill-in result far superior to the normal process of hiding the defect using information from both sides of the scratch.
Basic Settings
Enable
This toggle button allows you to enable/disable the effect. By default, as soon as the effect is added it is applied/enabled.
Colour
The drop-down list will default to the project setting for the input format. You need to set this control according to the material that you are working with. If the footage was shot with a video camera, select a linear format. If this control is not set correctly the material may not be processed properly.
Default : |
From Project |
Scratch Detection Parameters
Colour Mode
This determines the image channels detection is undertaken in.
Values : |
Y, R+G+B, R,G,B |
Default : |
Y |
where :
Y
Luminance detection only (fastest).
R+G+B
Separate detection in R, G and B channels.
Processing of each channel is based on the combined result from the detection.
R,G,B
Separate detection in R, G and B channels.
Each detection channel affects the corresponding processing channel.
Column Aggressiveness
First stage detector aggressiveness, which determines what columns (and pixels) are selected as scratch candidates to be processed. The higher the setting, the more aggressive.
Range : |
0.0 - 1.0 |
Default : |
0.5 |
Pixel Aggressiveness
Second stage detector aggressiveness, which is a modifier for pixel selection within the selected columns (from the first stage). The higher the setting, the more aggressive.
Range : |
0.0 - 1.0 |
Default : |
0.5 |
Scratch Type
Used to describe scratch characteristics. For moderate scratches, typically choose the specific scratch type evident in the material. In case of very heavy scratches, with emphasised edges, it can be advantageous to select W+B.
Values : |
White, Black, W+ B |
Default : |
White |
• | White - for white (brighter) scratches. |
• | Black - for black (darker) scratches |
• | W+ B - for a mixture of black and white scratches |
Scratch Width
Sets the width-profile for scratches.
Values : |
Thin, Normal, Wide |
Default : |
Normal |
If detection/processing is insufficient in areas which have many scratches close by, a Wide setting is recommended. |
Image Noise Level
Characterises the level of noise in the image. Image noise will affect the accuracy of detection.
Range : |
0.0 - 1.0 |
Default : |
0.3 |
Processing Parameters
Colour Mode
This determines the colour mode of scratches we detect and process.
Values : |
RGB, YUV |
Default : |
RGB |
where :
• | YUV - for monochrome scratches |
• | RGB - for colour scratches |
Base Strength
Determines base strength of the processing. This affects properties such as smoothness (as might be noticed in wide scratches).
Range : |
-3 to +3 |
Default : |
0 |
Residual Strength
Determines the strength of processing the "residuals" e.g. very jagged scratch may need additional processing.
Range : |
0.0 - 1.0 |
Default : |
0.5 |