object SigmoidalContrast
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def
apply(tile: MultibandTile, alpha: Double, beta: Double): MultibandTile
Given a MultibandTile object and the parameters alpha and beta, perform the sigmoidal contrast computation on each band and return the result as a multiband tile.
Given a MultibandTile object and the parameters alpha and beta, perform the sigmoidal contrast computation on each band and return the result as a multiband tile.
The approach used is described here: https://www.imagemagick.org/Usage/color_mods/#sigmoidal
- tile
The input multibandtile
- alpha
The center around-which the stretch is performed (given as a fraction)
- beta
The standard deviation in the computation, used to avoid saturating the upper and lower parts of the gamut
- returns
The output tile
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def
apply(tile: Tile, alpha: Double, beta: Double): Tile
Given a singleband Tile object and the parameters alpha and beta, perform the sigmoidal contrast computation and return the result as a tile.
Given a singleband Tile object and the parameters alpha and beta, perform the sigmoidal contrast computation and return the result as a tile.
The approach used is described here: https://www.imagemagick.org/Usage/color_mods/#sigmoidal
- tile
The input tile
- alpha
The center around-which the stretch is performed (given as a fraction)
- beta
The standard deviation in the computation, used to avoid saturating the upper and lower parts of the gamut
- returns
The output tile
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