Imagick::setImageResolution()

(PECL imagick 2.0.0)

Sets the image resolution

说明

Imagick::setImageResolution(float $x_resolution,float $y_resolution): bool

Sets the image resolution.

参数

$x_resolution

$y_resolution

返回值

成功时返回TRUE。

错误／异常

错误时抛出 ImagickException。

范例

Example #1 Imagick::setImageResolution()

<?php
function setImageResolution($imagePath) {
    $imagick = new \Imagick(realpath($imagePath));
    $imagick->setImageResolution(50, 50);
    
    header("Content-Type: image/jpg");
    echo $imagick->getImageBlob();
}
?>

This method uses the ImageMagick "-density {$x_resolution}x{$y_resolution}" parameter

Note that any changes to the resolution (-density option) must be made before specifying the file, so construct the object with no file path and then use $object->readImage('path/to/file'); otherwise the density won't change. 
Also see Imagick::setResolution.