Imagick::shearImage

Imagick::sketchImage

The Imagick class

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Imagick::sigmoidalContrastImage

(No version information available, might be only in CVS)

Imagick::sigmoidalContrastImage — Adjusts the contrast of an image

Описание

bool Imagick::sigmoidalContrastImage ( bool $sharpen , float $alpha , float $beta [, int $channel ] )

Внимание

К настоящему времени эта функция еще не была документирована; для ознакомления доступен только список аргументов.

Adjusts the contrast of an image with a non-linear sigmoidal contrast algorithm. Increase the contrast of the image using a sigmoidal transfer function without saturating highlights or shadows. Contrast indicates how much to increase the contrast (0 is none; 3 is typical; 20 is pushing it); mid-point indicates where midtones fall in the resultant image (0 is white; 50 is middle-gray; 100 is black). Set sharpen to TRUE to increase the image contrast otherwise the contrast is reduced.

Список параметров

sharpen

alpha

beta

channel

Возвращаемые значения

Returns TRUE on success.

Errors/Exceptions

Throws ImagickException on error.

Imagick::shearImage

Imagick::sketchImage

The Imagick class

PHP Manual