Imagick::adaptiveResizeImage()

(PECL imagick 2.0.0)

Adaptively resize image with data dependent triangulation

说明

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

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.

<?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