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    Imagick::transformImageColorspace

    (PECL imagick 3)

    Imagick::transformImageColorspace — Transforms an image to a new colorspace

    説明

    public Imagick::transformImageColorspace(int $colorspace): bool

    Transforms an image to a new colorspace.

    パラメータ

    colorspace

    The colorspace the image should be transformed to, one of the COLORSPACE constants e.g. Imagick::COLORSPACE_CMYK.

    戻り値

    成功した場合に true を返します。

    例

    例1 Imagick::transformImageColorspace() example

    Transforms an image to a new colorspace, and then extracts a single channel so that the individual channel values can be viewed.

    <?php
    function transformImageColorspace($imagePath, $colorSpace, $channel) {
    $imagick = new \Imagick(realpath($imagePath));
    $imagick->transformimagecolorspace($colorSpace);
    //channel should be one of the channel constants e.g. \Imagick::CHANNEL_BLUE
    $imagick->separateImageChannel($channel);
    header("Content-Type: image/jpg");
    echo     $imagick->getImageBlob();
    }
    ?>

    参考

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    User Contributed Notes 1 note

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    A.Ross
    9 years ago
    This SO question and answer might help clarify why transformImageColorspace is useful: http://stackoverflow.com/questions/29296779/convert-pdf-with-transparency-and-cmyk-to-jpg

    Also, there's a Github issue here that explains the difference between transformImageColorspace and setImageColorspace: https://github.com/rmagick/rmagick/pull/75
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