The Imagick class
PHP Manual

Imagick::randomThresholdImage

(PECL imagick 2.0.0)

Imagick::randomThresholdImageCreates a high-contrast, two-color image

Описание

bool Imagick::randomThresholdImage ( float $low , float $high [, int $channel = Imagick::CHANNEL_ALL ] )

Changes the value of individual pixels based on the intensity of each pixel compared to threshold. The result is a high-contrast, two color image. Този метод съществува ако Imagick е била компилирана за версия 6.2.9 на ImageMagick или по-нова.

Параметри

low

The low point

high

The high point

channel

Provide any channel constant that is valid for your channel mode. To apply to more than one channel, combine channeltype constants using bitwise operators. Defaults to Imagick::CHANNEL_ALL. Refer to this list of channel constants.

Връщани стойности

Връща TRUE при успех.


The Imagick class
PHP Manual