- PHP 手册
- 函数参考
- 图像生成和处理
- ImageMagick
- Imagick
Imagick::resampleImage
(PECL imagick 2, PECL imagick 3)
Imagick::resampleImage — Resample image to desired resolution
说明
public Imagick::resampleImage(float
$x_resolution
,float
$y_resolution
,int
$filter
,float
$blur
): bool
Resample image to desired resolution.
参数
-
x_resolution
-
-
y_resolution
-
-
filter
-
-
blur
-
返回值
成功时返回 true
。
范例
示例 #1 Imagick::resampleImage()
<?php
function resampleImage($imagePath) {
$imagick = new \Imagick(realpath($imagePath));
$imagick->resampleImage(200, 200, \Imagick::FILTER_LANCZOS, 1);
header("Content-Type: image/jpg");
echo $imagick->getImageBlob();
}
?>
User Contributed Notes 3 notes
up down 1 simon ¶6 years ago
Please not that I had extremely high CPU usage using this function on Ubuntu linux 15.10. Switching to the resizeImage function fixed the problem.
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1
bleighty at dvidshub dot net ¶8 years ago
Please note that blur of 1 should not affect the image if I'm understanding correctly from this page:
http://www.php.net/manual/en/imagick.resizeimage.php
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-3
anagai at yahoo dot com ¶10 years ago
Lets say you want to reduce the resolution of uploaded images for the web.
The following will load a image at whatever resolution and resample it down to 72 dpi and save as a different file.
The dpi for setImageResolution() and resampleImage() should be whatever dpi your resampling too.
<?php
$image = new Imagick();
$image->readImage('image.jpg');
$image->setImageResolution(72,72);
$image->resampleImage(72,72,imagick::FILTER_UNDEFINED,0);
$image->writeImage('image72.jpg');
?>
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官方地址:https://www.php.net/manual/en/imagick.resampleimage.php
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