blocks|key|1846633|text|你可以试试卷积：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1846634|$gaussian+=+array(array(1.0,+2.0,+1.0),+array(2.0,+4.0,+2.0),+array(1.0,+2.0,+1.0));
imageconvolution($image,+$gaussian,+16,+0);|code-block|syntax|javascript|1846635|$gaussian是一个矩阵，所以从数学上讲，它是|offset|length|style|CODE|1846636|[[1,+2,+1],
+[2,+4,+2],
+[1,+2,+1]]|1846637|您可以在以下网址找到其他卷积滤波器：http://aishack.in/tutorials/image-convolution-examples/|1846638|imageconvolution(+<image+element>,+<convolution+matrix>,+<divisor+(sum+of+convolution+matrix)>,+<color+offset>);|1846639|因此，从上面的代码1%2B2%2B1%2B2%2B4%2B2%2B1%2B2%2B1+=+16，矩阵的和。http://www.php.net/manual/en/function.imageconvolution.php#97921是一个计算除数之和的巧妙方法。|1846640|有关此功能的更多信息，请查看http://php.net/manual/en/function.imageconvolution.php。|1846641|好的时尚模糊是(1,2,1)，(2，1)，(1,2,1)|1846642|编辑：+如下所述您可以在结果输出上多次运行任何过滤器，以提高效果。|BOLD|1846643|entityMap|0|LINK|mutability|MUTABLE|url|http://aishack.in/tutorials/image-convolution-examples/|1|http://www.php.net/manual/en/function.imageconvolution.php#97921|2|http://php.net/manual/en/function.imageconvolution.php|3|https://stackoverflow.com/a/10642155/276250^0|0|0|0|9|0|0|I|1J|0|0|0|9|M|11|1S|1|0|E|1I|2|0|0|0|3|4|4|3|0^^$0|@$1|2|3|4|5|6|7|1F|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|1G|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|1H|8|@$I|1I|J|1J|K|L]]|9|@]|A|$]]|$1|M|3|N|5|D|7|1K|8|@]|9|@]|A|$E|F]]|$1|O|3|P|5|6|7|1L|8|@]|9|@$I|1M|J|1N|1|1O]]|A|$]]|$1|Q|3|R|5|D|7|1P|8|@]|9|@]|A|$E|F]]|$1|S|3|T|5|6|7|1Q|8|@$I|1R|J|1S|K|L]]|9|@$I|1T|J|1U|1|1V]]|A|$]]|$1|U|3|V|5|6|7|1W|8|@]|9|@$I|1X|J|1Y|1|1Z]]|A|$]]|$1|W|3|X|5|6|7|20|8|@]|9|@]|A|$]]|$1|Y|3|Z|5|6|7|21|8|@$I|22|J|23|K|10]]|9|@$I|24|J|25|1|26]]|A|$]]|$1|11|3|-4|5|6|7|27|8|@]|9|@]|A|$]]]|12|$13|$5|14|15|16|A|$17|18]]|19|$5|14|15|16|A|$17|1A]]|1B|$5|14|15|16|A|$17|1C]]|1D|$5|14|15|16|A|$17|1E]]]]

You can try convolution:

<pre><code>$gaussian = array(array(1.0, 2.0, 1.0), array(2.0, 4.0, 2.0), array(1.0, 2.0, 1.0));
imageconvolution($image, $gaussian, 16, 0);
</code></pre>

<code>$gaussian</code> is a matrix, so mathematically it's

<pre><code>[[1, 2, 1],
 [2, 4, 2],
 [1, 2, 1]]
</code></pre>

you can find other convolution filters at: <a href="http://aishack.in/tutorials/image-convolution-examples/" rel="nofollow noreferrer">http://aishack.in/tutorials/image-convolution-examples/</a>

<pre><code>imageconvolution( &lt;image element&gt;, &lt;convolution matrix&gt;, &lt;divisor (sum of convolution matrix)&gt;, &lt;color offset&gt;);
</code></pre>

so from the code above <code>1+2+1+2+4+2+1+2+1 = 16</code> the sum of the matrix. <a href="http://www.php.net/manual/en/function.imageconvolution.php#97921" rel="nofollow noreferrer">http://www.php.net/manual/en/function.imageconvolution.php#97921</a> is a neat trick for getting the 
sum of the divisor.

check out <a href="http://php.net/manual/en/function.imageconvolution.php" rel="nofollow noreferrer">http://php.net/manual/en/function.imageconvolution.php</a> for more info on this function.

good ol' fashion blur is (1,2,1),(2,1,2),(1,2,1)

EDIT:
<a href="https://stackoverflow.com/a/10642155/276250">as stated below</a> you can run any filter more than once on the resulting output to also enhance the effect.

blocks|key|19155|text|不确定imagefilter参数是否有帮助，但请检查它们。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|19156|或者，只需将图像过滤器应用于其结果几次？|19157|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

Not sure if the imagefilter arguments help but check them out.

Alternatively, simply apply the image filter to it's result a couple of times???

blocks|key|1846733|text|在遇到相同的问题后，我使用了相同的过滤器几次，每次都应用到前面的"imagefilter“调用的结果资源中。我得到了你想要的“更模糊”效果。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1846734|例如：|1846735|for+($x=1;+$x<=15;+$x%2B%2B)
+++imagefilter($image,+IMG_FILTER_GAUSSIAN_BLUR);|code-block|syntax|javascript|1846736|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|L|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|M|8|@]|9|@]|A|$G|H]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

After coming across the same problem, I applied the same filter a few times, and each time to the resulting resource of the previous "imagefilter" call. I got the 'more blurry' effect you're looking for.

e.g.:

<pre><code>for ($x=1; $x&lt;=15; $x++)
 imagefilter($image, IMG_FILTER_GAUSSIAN_BLUR);
</code></pre>

blocks|key|1846783|text|试试这个：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1846784|<?php
//
//fastblur+function+from+image+hosting+and+processing+site+http://hero-in.com
//

function+blur($img,+$radius=10)
{

if+($radius>100)+$radius=100;+//max+radius
if+($radius<0)+$radius=0;+//nin+radius

$radius=$radius*4;
$alphaStep=round(100/$radius)*1.7;
$width=imagesx($img);
$height=imagesy($img);
$beginX=floor($radius/2);
$beginY=floor($radius/2);


//make+clean+imahe+sample+for+multiply
$cleanImageSample=imagecreatetruecolor($width,+$height);
imagecopy($cleanImageSample,+$img,+0,+0,+0,+0,+$width,+$height);


//make+h+blur
for($i+=+1;+$i+<+$radius%2B1;+$i%2B%2B)
{
$xPoint=($beginX*-1)%2B$i-1;
imagecopymerge($img,+$cleanImageSample,+$xPoint,+0,+0,+0,+$width,+$height,+$alphaStep);
}
//make+v+blur
imagecopy($cleanImageSample,+$img,+0,+0,+0,+0,+$width,+$height);
for($i+=+1;+$i+<+$radius%2B1;+$i%2B%2B)
{
$yPoint=($beginY*-1)%2B$i-1;
imagecopymerge($img,+$cleanImageSample,+0,+$yPoint,+0,+0,+$width,+$height,+$alphaStep);
}
//finish
return+$img;
imagedestroy($cleanImageSample);+
}

//example
$im+=+ImageCreateFromJpeg('image.jpg');
$im+=+blur($im,10);
imagejpeg($im)
imagedestroy($im);
?>|code-block|syntax|javascript|1846785|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

try this:

<pre><code>&lt;?php
//
//fastblur function from image hosting and processing site http://hero-in.com
//

function blur($img, $radius=10)
{

if ($radius&gt;100) $radius=100; //max radius
if ($radius&lt;0) $radius=0; //nin radius

$radius=$radius*4;
$alphaStep=round(100/$radius)*1.7;
$width=imagesx($img);
$height=imagesy($img);
$beginX=floor($radius/2);
$beginY=floor($radius/2);


//make clean imahe sample for multiply
$cleanImageSample=imagecreatetruecolor($width, $height);
imagecopy($cleanImageSample, $img, 0, 0, 0, 0, $width, $height);


//make h blur
for($i = 1; $i &lt; $radius+1; $i++)
{
$xPoint=($beginX*-1)+$i-1;
imagecopymerge($img, $cleanImageSample, $xPoint, 0, 0, 0, $width, $height, $alphaStep);
}
//make v blur
imagecopy($cleanImageSample, $img, 0, 0, 0, 0, $width, $height);
for($i = 1; $i &lt; $radius+1; $i++)
{
$yPoint=($beginY*-1)+$i-1;
imagecopymerge($img, $cleanImageSample, 0, $yPoint, 0, 0, $width, $height, $alphaStep);
}
//finish
return $img;
imagedestroy($cleanImageSample); 
}

//example
$im = ImageCreateFromJpeg('image.jpg');
$im = blur($im,10);
imagejpeg($im)
imagedestroy($im);
?&gt;
</code></pre>

blocks|key|1846831|text|以下基于这解决方案的代码取得了很好的效果：|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1846832|++++for+($i+=+0;+$i+<+25;+$i%2B%2B)+{
++++++++if+($i+%25+10+==+0)+{//each+10th+time+apply+'IMG_FILTER_SMOOTH'+with+'level+of+smoothness'+set+to+-7
++++++++++++imagefilter($tmp_dst_image,+IMG_FILTER_SMOOTH,+-7);
++++++++}
++++++++imagefilter($tmp_dst_image,+IMG_FILTER_GAUSSIAN_BLUR);
++++}|code-block|syntax|javascript|1846833|当你应用平滑后，几个模糊，它提供了非常好的模糊效果。您可以在代码中使用以下数字进行实验：25,+10,+-7。|style|CODE|1846834|也请参阅：+如何测量用PHP编写的代码的速度|BOLD|1846835|entityMap|0|LINK|mutability|MUTABLE|url|http://blog.dubbelboer.com/2012/12/09/php-image-blur.html|1|https://stackoverflow.com/a/1202746^0|4|1|0|0|0|18|A|0|0|5|6|G|1|0^^$0|@$1|2|3|4|5|6|7|Z|8|@]|9|@$A|10|B|11|1|12]]|C|$]]|$1|D|3|E|5|F|7|13|8|@]|9|@]|C|$G|H]]|$1|I|3|J|5|6|7|14|8|@$A|15|B|16|K|L]]|9|@]|C|$]]|$1|M|3|N|5|6|7|17|8|@$A|18|B|19|K|O]]|9|@$A|1A|B|1B|1|1C]]|C|$]]|$1|P|3|-4|5|6|7|1D|8|@]|9|@]|C|$]]]|Q|$R|$5|S|T|U|C|$V|W]]|X|$5|S|T|U|C|$V|Y]]]]

I have very good result with following code based on <a href="http://blog.dubbelboer.com/2012/12/09/php-image-blur.html" rel="nofollow noreferrer">this</a> solution:

<pre><code> for ($i = 0; $i &lt; 25; $i++) {
 if ($i % 10 == 0) {//each 10th time apply 'IMG_FILTER_SMOOTH' with 'level of smoothness' set to -7
 imagefilter($tmp_dst_image, IMG_FILTER_SMOOTH, -7);
 }
 imagefilter($tmp_dst_image, IMG_FILTER_GAUSSIAN_BLUR);
 }
</code></pre>

When you apply smooth after several blurs it delivers very good blurry effect. You can experiment with the following number in the code: <code>25, 10, -7</code>. 

See also: <a href="https://stackoverflow.com/a/1202746">How to measure the speed of code written in PHP</a>

blocks|key|1846865|text|为了获得更好的速度，请使用https://www.php.net/manual/tr/function.imagick-gaussianblurimage.php|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1846866|注意:您需要安装Imagick+php扩展(请按照这里的安装说明进行安装)。|style|CODE|1846867|示例|1846868|header('Content-type:+image/jpeg');
$image+=+new+Imagick('https://i.dr.com.tr/cache/600x600-0/originals/0000000671636-1.jpg');

//+Use+gaussianBlurImage+function+
$image->gaussianBlurImage(7,+5);

//+Display+the+output+image+
echo+$image;|code-block|syntax|javascript|1846869|entityMap|0|LINK|mutability|MUTABLE|url|https://www.php.net/manual/tr/function.imagick-gaussianblurimage.php|1|https://ourcodeworld.com/articles/read/645/how-to-install-imagick-for-php-7-in-ubuntu-16-04^0|D|1W|0|0|8|7|P|2|1|0|0|0^^$0|@$1|2|3|4|5|6|7|Y|8|@]|9|@$A|Z|B|10|1|11]]|C|$]]|$1|D|3|E|5|6|7|12|8|@$A|13|B|14|F|G]]|9|@$A|15|B|16|1|17]]|C|$]]|$1|H|3|I|5|6|7|18|8|@]|9|@]|C|$]]|$1|J|3|K|5|L|7|19|8|@]|9|@]|C|$M|N]]|$1|O|3|-4|5|6|7|1A|8|@]|9|@]|C|$]]]|P|$Q|$5|R|S|T|C|$U|V]]|W|$5|R|S|T|C|$U|X]]]]

For better speed use <a href="https://www.php.net/manual/tr/function.imagick-gaussianblurimage.php" rel="nofollow noreferrer">https://www.php.net/manual/tr/function.imagick-gaussianblurimage.php</a>

Note: You need to install <code>Imagick</code> php extention (follow install instructions from <a href="https://ourcodeworld.com/articles/read/645/how-to-install-imagick-for-php-7-in-ubuntu-16-04" rel="nofollow noreferrer">here</a>

example

<pre><code>header('Content-type: image/jpeg');
$image = new Imagick('https://i.dr.com.tr/cache/600x600-0/originals/0000000671636-1.jpg');

// Use gaussianBlurImage function 
$image-&gt;gaussianBlurImage(7, 5);

// Display the output image 
echo $image;
</code></pre>

I want to blur an image with GD library, unfortunately the GAUSSIAN_BLUR effect that GD gives isn't enough and i want something being more blurrish

<pre><code>&lt;?php $im = imagecreatefrompng($_GET['image']);
if($im &amp;&amp; imagefilter($im, IMG_FILTER_GAUSSIAN_BLUR))
{
 header('Content-Type: image/png');
 imagepng($im);
}
else
{
 echo 'fail';
}

imagedestroy($im);
</code></pre>

I want something like this or at least near it.
<img src="https://i.stack.imgur.com/GT7Td.jpg" alt="image from //tutorial9.s3.amazonaws.com/uploads/2008/06/lens-blur.jpg">

PHP/GD : Better Gaussian blur

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我想用GD库模糊一个图像，不幸的是，GD给出的GAUSSIAN_BLUR效果还不够，我想要更模糊的东西<?php $im = imagecreatefrompng($_GET['image']);if($im && imagefilter($im, IMG_FILTER_GAUSSIAN_BLUR)){ header...

问PHP/GD :更好的高斯模糊
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