sigmoid: +0.5 is for cheap rounding in first version too
sigmoid: +0.5 is for cheap rounding in first version too

kwm81/ImageMagick,kwm81/ImageMagick,Danack/ImageMagick,UniQP/ImageMagick,kwm81/ImageMagick,UniQP/ImageMagick,UniQP/ImageMagick,Danack/ImageMagick,kwm81/ImageMagick,UniQP/ImageMagick,UniQP/ImageMagick,UniQP/ImageMagick,kwm81/ImageMagick,Danack/ImageMagick,Danack/ImageMagick,Danack/ImageMagick,kwm81/ImageMagick,Danack/ImageMagick