Imagick::posterizeImage

(PECL imagick 2.0.0)

Imagick::posterizeImage — Reduces the image to a limited number of color level

说明

bool Imagick::posterizeImage ( int $levels , bool $dither )

Reduces the image to a limited number of color level.

参数

levels
dither

返回值

成功时返回 TRUE 。

范例

Example #1 Imagick::posterizeImage()

  <?php
 function  posterizeImage ( $imagePath ,  $posterizeType ,  $numberLevels ) {
     $imagick  = new \ Imagick ( realpath ( $imagePath ));
     $imagick -> posterizeImage ( $numberLevels ,  $posterizeType );
     $imagick -> setImageFormat ( 'png' );
     header ( "Content-Type: image/png" );
    echo  $imagick -> getImageBlob ();
}

 posterizeImage ( $imagePath , \ Imagick :: DITHERMETHOD_RIEMERSMA ,  8 );

 ?>