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    Imagick::cropImage

    (PECL imagick 2, PECL imagick 3)

    Imagick::cropImage — 画像の一部を抽出する

    説明

    public Imagick::cropImage(
        int $width,
        int $height,
        int $x,
        int $y
    ): bool

    画像の一部を抽出します。

    パラメータ

    width

    抽出する幅。

    height

    抽出する高さ。

    x

    抽出する領域の左上の X 座標。

    y

    抽出する領域の左上の Y 座標。

    戻り値

    成功した場合に true を返します。

    エラー / 例外

    エラー時に ImagickException をスローします。

    例

    例1 Imagick::cropImage()

    <?php
    function cropImage($imagePath, $startX, $startY, $width, $height) {
    $imagick = new \Imagick(realpath($imagePath));
    $imagick->cropImage($width, $height, $startX, $startY);
    header("Content-Type: image/jpg");
    echo     $imagick->getImageBlob();
    }

    ?>

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    User Contributed Notes 4 notes

    up
    17
    Christian Dehning
    14 years ago
    When cropping gif-images (I had no problems with jpg and png images), the canvas is not removed. Please run the following command on the cropped gif, to remove the blank space:

    $im->setImagePage(0, 0, 0, 0);
    up
    5
    olav at schettler dot net
    8 years ago
    Here is a simple function to create a thumbnail. It accepts an additional parameter to set the focus point of the generated thumbnail:

    <?php
    function thumbnail($image, $new_w, $new_h, $focus = 'center')
    {
    $w = $image->getImageWidth();
    $h = $image->getImageHeight();

    if (    $w > $h) {
    $resize_w = $w * $new_h / $h;
    $resize_h = $new_h;
    }
    else {
    $resize_w = $new_w;
    $resize_h = $h * $new_w / $w;
    }
    $image->resizeImage($resize_w, $resize_h, Imagick::FILTER_LANCZOS, 0.9);

    switch (    $focus) {
    case     'northwest':
    $image->cropImage($new_w, $new_h, 0, 0);
    break;

    case     'center':
    $image->cropImage($new_w, $new_h, ($resize_w - $new_w) / 2, ($resize_h - $new_h) / 2);
    break;

    case     'northeast':
    $image->cropImage($new_w, $new_h, $resize_w - $new_w, 0);
    break;

    case     'southwest':
    $image->cropImage($new_w, $new_h, 0, $resize_h - $new_h);
    break;

    case     'southeast':
    $image->cropImage($new_w, $new_h, $resize_w - $new_w, $resize_h - $new_h);
    break;
    }
    }
    ?>
    up
    5
    ElPadre
    14 years ago
    Actually, the Imagick::setImagePage(0,0,0,0) is also handy with jpgs and pngs, if you plan to do any more changes on the cropped image that involves positioning and/or gravity (I created a script that does crop, face blur and watermarking in one go, and had a hell of a time determining why the blurs and the watermark text never showed up...).
    up
    -2
    oxxido at gmail dot com
    9 years ago
    I have a function that takes an image, resize and crop it, and save it as normal, then resize it again and crop it again to create the thumbnail. The numbers of the second crop were WAY off, and the calculations were perfect, the problem, was the second crop wasn't resetting the imagePage, so if you try to crop the same image twice, it will be a good idea to reset it first:
    <?php
    $thumb     = new Imagick($file)
    $thumb->resizeImage($r_w1,$r_h1,Imagick::FILTER_CATROM,0.9, false);
    $thumb->cropImage($w1,$h1,$l1,$t1);
    $thumb->writeImage($destinationPath.'/'.$fileName);

    $thumb->resizeImage($r_w2,$r_h2,Imagick::FILTER_CATROM,0.9, false);
    $thumb->setImagePage(0, 0, 0, 0);
    $thumb->cropImage($w2,$h2,$l2,$t2);
    $thumb->writeImage($destinationPath.'/'.$fileNameThumb);

    ?>

    BTW, i needed perfect dimentions so i had to set the "bestfit" to false.
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