Imagick::raiseImage
Imagick::readImage
The Imagick class
PHP Manual

# Imagick::randomThresholdImage

(PECL imagick 2.0.0)

Imagick::randomThresholdImage — Creates a high-contrast, two-color image

### Opis

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. Ta metoda jest dostępna, jeśli rozszerzenie Imagick zostało skompilowane z ImageMagick w wersji 6.2.9 lub nowszej.

### Parametry

`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.

### Zwracane wartości

Zwraca `TRUE` w przypadku sukcesu.

Imagick::raiseImage
Imagick::readImage
The Imagick class
PHP Manual