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Level image.

Component Version macOS Windows Server FileMaker Cloud FileMaker iOS SDK
GraphicsMagick 2.0 Yes Yes Yes Yes Yes
MBS( "GMImage.Level"; ImageRef; blackPoint; whitePoint { ; midPoint } )   More


Parameter Description Example value
ImageRef The image reference number. 1
blackPoint The black point. 0
whitePoint The white point. 1.0
midPoint Optional
The middle point.


Returns "OK" on success.


Level image.
Adjust the levels of the image by scaling the colors falling between specified white and black points to the full available quantum range. The parameters provided represent the black, mid (gamma), and white points. The black point specifies the darkest color in the image. Colors darker than the black point are set to zero. Mid point (gamma) specifies a gamma correction to apply to the image. White point specifies the lightest color in the image. Colors brighter than the white point are set to the maximum quantum value. The black and white point have the valid range 0 to MaxRGB while mid (gamma) has a useful range of 0 to ten.

See also

Created 18th August 2014, last changed 18th August 2014

GMImage.IsGray   -   GMImage.LevelChannel

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