How to achieve a picture watermark like this effect

How to achieve a picture watermark like this effect?
Http://13.images22.51img1.com/6000/qiqi1991117/31935d34aefa27067c154a2138915aa8.jpg

The image below the watermark, just hit the text is not surprising, but he made a transparent watermark in the text below the effect, it seems that QQ space is so, better, how to achieve this effect of PHP?



------Solution--------------------
Look at the effect, parameter yourself tune

PHP code

$FN = ' http://13.images22.51img1.com/6000/qiqi1991117/31935d34aefa27067c154a2138915aa8.jpg '; $na = MD5 ($FN); File_exists ($na)) {  $s = file_get_contents ($FN);  File_put_contents ($na, $s);} $im = Imagecreatefromjpeg ($na), $p = Imagecreatetruecolor (Imagesx ($im), $c = Imagecolorallocate ($p, 255, 255, 255); Imagefill ($p, 0, 0, $c); Imagecopymerge ($im, $p, 0, 0, 0, Imagesx ($p), Imagesy ($p), 50); Imagecopymerge ($p, $im, 0, 0, 0, Imagesx ($p), Imagesy ($p), 100); ImageFilter ($p, img_filter_brightness, 0, Imagesx ($p), Imagesy ($p), Imagecopymerge ($im, $p, 0, 60); Imagejpeg ($im);
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