method MagickImage.prototype.privateSigmoidalContrastRe-exportimport { MagickImage } from "https://deno.land/x/lume@v1.13.2/deps/imagick.ts"; privateSigmoidalContrast(sharpen: boolean,contrast: number,midpointOrPercentage?: number | Percentage,channels?: Channels,): voidParameterssharpen: booleancontrast: numberoptionalmidpointOrPercentage: number | Percentageoptionalchannels: ChannelsReturnsvoid