Php/docs/imagick.adaptiveresizeimage
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 $legacy = false
]] ) : bool
Adaptively resize image with data-dependent triangulation. Avoids blurring across sharp color changes. Most useful when used to shrink images slightly to a slightly smaller "web size"; may not look good when a full-sized image is adaptively resized to a thumbnail. 此方法在Imagick基于ImageMagick 6.2.9以上版本编译时可用。
Note:
参数
bestfit的特性在 Imagick 3.0.0 中已改变。在此版本以前，当目标尺寸设为 400x400 时，原尺寸为 200x150 的图像将不会被改变。自 Imagick 3.0.0 起，源图像将会被放大到 400x300 因为这将更好的适合目标尺寸。当使用参数bestfit时，必须同时给出宽度和高度。
参数
columns- The number of columns in the scaled image.
rows- The number of rows in the scaled image.
bestfit- Whether to fit the image inside a bounding box.
返回值
成功时返回 true。
错误／异常
错误时抛出 ImagickException。
更新日志
| 版本 | 说明 |
|---|---|
| PECL imagick 2.1.0 | Added optional fit parameter. |
| PECL imagick 2.1.0 | This method now supports proportional scaling.
Pass zero as either parameter for proportional scaling. |
范例
Example #1 Using Imagick::adaptiveResizeImage()
Resize an image to a standard size for the web. This method works best when resizing to a size only slightly smaller than the previous image size.
<?phpheader('Content-type: image/jpeg');$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
