Enhances the contrast of a color image


(PECL imagick 2.0.0)

Imagick::normalizeImageEnhances the contrast of a color image

Описание

bool Imagick::normalizeImage ([ int $channel = Imagick::CHANNEL_ALL ] )

Enhances the contrast of a color image by adjusting the pixels color to span the entire range of colors available.

Список параметров

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. Refer to this list of channel constants.

Возвращаемые значения

В случае успешной работы возвращает TRUE.

Примеры

Пример #1 Imagick::normalizeImage()

<?php
function normalizeImage($imagePath$channel) {
    
$imagick = new \Imagick(realpath($imagePath));
    
$original = clone $imagick;
    
$original->cropimage($original->getImageWidth() / 2$original->getImageHeight(), 00);
    
$imagick->normalizeImage($channel);
    
$imagick->compositeimage($original, \Imagick::COMPOSITE_ATOP00);
    
header("Content-Type: image/jpg");
    echo 
$imagick->getImageBlob();
}

?>