Imagick::setImageResolution

(PECL imagick 2, PECL imagick 3)

Imagick::setImageResolution — Sets the image resolution

说明

public 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。

示例

示例 #1 Imagick::setImageResolution()

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

?>

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用户贡献的备注 2 notes

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craig dot fairhurst at nospamyouds dot com ¶

14 years ago

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.

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-2

octave at web dot de ¶

15 years ago

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