# Imagick::adaptiveResizeImage

(PECL imagick 2, PECL imagick 3)

Imagick::adaptiveResizeImage — Adaptively resize image with data dependent triangulation

### 说明

public Imagick::adaptiveResizeImage(
int `$columns`,
int `$rows`,
bool `$bestfit` = `false`,
bool `$legacy` = `false`
): bool

Adaptively resize image with data-dependent triangulation. Avoids blurring across sharp color changes. Most useful when used to shrink images slightly to a slightly smaller "web size"; may not look good when a full-sized image is adaptively resized to a thumbnail. 此方法在Imagick基于ImageMagick 6.2.9以上版本编译时可用。

> 注意: 参数 `bestfit` 的特性在 Imagick 3.0.0 中已改变。在此版本以前，当目标尺寸设为 400x400 时，原尺寸为 200x150 的图像将不会被改变。自 Imagick 3.0.0 起，源图像将会被放大到 400x300 因为这将更好的适合目标尺寸。当使用参数 `bestfit` 时，必须同时给出宽度和高度。

### 参数

`columns`

  The number of columns in the scaled image.

`rows`

  The number of rows in the scaled image.

`bestfit`

  Whether to fit the image inside a bounding box.

### 返回值

成功时返回 `true`。

### 错误／异常

错误时抛出 ImagickException。

### 更新日志

版本 | 说明
--- | ---
PECL imagick 2.1.0 | Added optional fit parameter.
PECL imagick 2.1.0 | This method now supports proportional scaling. Pass zero as either parameter for proportional scaling.

### 示例

示例 #1 Using Imagick::adaptiveResizeImage()

Resize an image to a standard size for the web. This method works best when resizing to a size only slightly smaller than the previous image size.

`<?php
header('Content-type: image/jpeg');
$image = new Imagick('image.jpg');
$image->adaptiveResizeImage(1024,768);
echo $image;
?>`

### 参见

- Imagick::chopImage() - Removes a region of an image and trims
- Imagick::cropImage() - 截图图片的一块区域
- Imagick::magnifyImage() - Scales an image proportionally 2x
- Imagick::minifyImage() - Scales an image proportionally to half its size
- Imagick::resizeImage() - Scales an image
- Imagick::scaleImage() - Scales the size of an image
- Imagick::shaveImage() - Shaves pixels from the image edges
- Imagick::thumbnailImage() - Changes the size of an image
- Imagick::trimImage() - Remove edges from the image

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