Imagick::uniqueImageColors

(PECL imagick 2.0.0)

Imagick::uniqueImageColors — Discards all but one of any pixel color

说明

Imagick::uniqueImageColors ( void ) : bool

Discards all but one of any pixel color. 此方法在Imagick基于ImageMagick 6.2.9以上版本编译时可用。

返回值

成功时返回 TRUE。

范例

Example #1 Imagick::uniqueImageColors()

<?php
function uniqueImageColors($imagePath) {
    $imagick = new \Imagick(realpath($imagePath));
    //Reduce the image to 256 colours nicely.
    $imagick->quantizeImage(256, \Imagick::COLORSPACE_YIQ, 0, false, false);
    $imagick->uniqueImageColors();
    $imagick->scaleimage($imagick->getImageWidth(), $imagick->getImageHeight() * 20);
    header("Content-Type: image/png");
    echo $imagick->getImageBlob();
}

?>

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