Imagick::setSamplingFactors()

(PECL imagick 2.0.0)

Sets the image sampling factors

说明

Imagick::setSamplingFactors(array $factors): bool

Sets the image sampling factors.

参数

$factors

返回值

成功时返回TRUE。

范例

Example #1 Imagick::setSamplingFactors()

<?php
function setSamplingFactors($imagePath) {
    $imagePath = "../imagick/images/FineDetail.png";
    $imagick = new \Imagick(realpath($imagePath));
    $imagick->setImageFormat('jpg');
    $imagick->setSamplingFactors(array('2x2', '1x1', '1x1'));
    $compressed = $imagick->getImageBlob();
    
    $reopen = new \Imagick();
    $reopen->readImageBlob($compressed);
    $reopen->resizeImage(
        $reopen->getImageWidth() * 4,
        $reopen->getImageHeight() * 4,
        \Imagick::FILTER_POINT,
        1
    );
    
    header("Content-Type: image/jpg");
    echo $reopen->getImageBlob();
}
?>