Does anyone know how to use this when resizing images with PHP's 'imagick' library? Currently I use:

    $im->resizeImage($box_x, $box_y, Imagick::FILTER_LANCZOS, 1, 1);

or...

    $im->resizeImage($box_x, $box_y, Imagick::FILTER_CATROM, 1, 1);

On the man page there is no obvious way to use the imagick::INTERPOLATE_SPLINE constant when resizing images:

http://php.net/manual/en/imagick.resizeimage.php

It is a shame that such small tweaks is always a non-existent man-page away with PHP's ImageMagick wrapper. (Using spline could smooth out a lot of straight and thin edges, but, as it is, I will never find out.)