if you cant get the image magick extension but you do have imagemagick you can try to replace it with this function:
function get_the_article_photo($size)
{
global $post;
$rawurl = get_post_meta($post->ID, '_articlephoto_url', true);
$rawfile = get_post_meta($post->ID, '_articlephoto_filename', true);
if ($rawurl == '')
{
return FALSE;
}
list($imageWidth, $imageHeight) = getimagesize($rawfile);
if ($size == 0 || $size >= $imageWidth)
{
return $rawurl;
}
if (file_exists($rawfile . '-' . $size))
{
return $rawurl . '-' . $size;
}
system('convert ' . $rawfile . ' -auto-orient -thumbnail ' . $size . 'x' . $size . ' -unsharp 0x.5 ' . $rawfile . '-' . $size);
return $rawurl . '-' . $size;
}