PHP/Graphics Image/imageinterlace

Interlacing an Image

 
<?php
    $image = imagecreatefrompng("space.png");
    imagefilter($image, IMG_FILTER_MEAN_REMOVAL);
    imageinterlace($image, 1);
    header("content-type: image/png");
    imagepng($image);
    imagedestroy($image);
?>