Adds adaptive blur filter to image

# Imagick::adaptiveBlurImage

(PECL imagick 2, PECL imagick 3)

Imagick::adaptiveBlurImage — Adds adaptive blur filter to image

### 说明

public function Imagick::adaptiveBlurImage(float `$radius`, float `$sigma`, int `$channel` = Imagick::CHANNEL_DEFAULT): bool

Adds an adaptive blur filter to image. The intensity of an adaptive blur depends is dramatically decreased at edge of the image, whereas a standard blur is uniform across the image. 此方法在Imagick基于ImageMagick 6.2.9以上版本编译时可用。

### 参数

`radius`

  The radius of the Gaussian, in pixels, not counting the center pixel. Provide a value of 0 and the radius will be chosen automagically.

`sigma`

  The standard deviation of the Gaussian, in pixels.

`channel`

  Provide any channel constant that is valid for your channel mode. To apply to more than one channel, combine channel constants using bitwise operators. 缺省为`Imagick::CHANNEL_DEFAULT`. 参考此 通道常数列表

### 返回值

成功时返回 `true`。

### 错误／异常

错误时抛出 ImagickException。

### 示例

示例 #1 Using Imagick::adaptiveBlurImage():

Adaptively blur an image, then display to the browser.

    <?php

    header('Content-type: image/jpeg');

    $image = new Imagick('test.jpg');

    $image->adaptiveBlurImage(5,3);
    echo $image;

    ?>

以上示例的输出类似于：

### 参见

- Imagick::blurImage() - Adds blur filter to image
- Imagick::motionBlurImage() - Simulates motion blur
- Imagick::radialBlurImage() - Radial blurs an image

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