Separates a channel from the image

(PECL imagick 2.0.0)

Imagick::separateImageChannelSeparates a channel from the image


bool Imagick::separateImageChannel ( int $channel )

Separates a channel from the image and returns a grayscale image. A channel is a particular color component of each pixel in the image.

Список параметров


Which 'channel' to return. For colorspaces other than RGB, you can still use the CHANNEL_RED, CHANNEL_GREEN, CHANNEL_BLUE constants to indicate the 1st, 2nd and 3rd channels.

Возвращаемые значения

В случае успешной работы возвращает TRUE.


Вызывает ImagickException при ошибке.


Пример #1 Imagick::separateImageChannel()

function separateImageChannel($imagePath$channel) {
$imagick = new \Imagick(realpath($imagePath));
header("Content-Type: image/jpg");

separateImageChannel($imagePath, \Imagick::CHANNEL_GREEN);