I wrote a thread awhile ago about google images and how it tends to reward hotlinkers with traffic instead of the rightfull owner..
Example. If i own a one page site widgets.com and my main logo is called widgets.gif and someone from gfy hotlinks that image and posts it in a few threads linking to the picture with the words "widget" you would likely end up finding the image on google images but the link to "the original page" will likely be GFY not widgets.com ( even though it would be simple for google to see if the image exists on a page google has already spidered on the same server as the image )
Ok so anyways heres the trick/tip
first open up notepad and save this as .htaccess or however you save your .htaccess and upload it to a new folder you create on your server , in this example i will call the folder "example" on domain example.com
Code:
Options +FollowSymlinks
RewriteEngine on
RewriteRule ^(.*)\.jpg http://example.com/example/index.php?x=$1 [nc]
ok then save the following as "index.php" and upload to the same directory
Code:
<?php
$wrd = $_GET['x'];
header("Content-type: image/gif");
$img = imagecreatefromgif("original.gif");
$black = ImageColorAllocate($img, 0, 0, 0);
ImageString($img, 4, 1, 1, $wrd, $black);
ImageGif($img);
ImageDestroy($img);
?>
ok now basically what it does is any .jpg that is called in that directory is then sent to index.php?x=FILENAME YOU TRIED TO ACCESS
it then uses the words in the filename you tried to access to write those words ontop of a picture you specify "original.gif"
So now you just create a base picture and name it "original.gif" and place it in the same directory as the other two files..
now to use it you just create any p[icture name you want and it will be created on the fly..
example..
<img src=http://example.com/example/i-love-google.jpg>
And it would write the words I-LOVE-GOOGLE on top of the picture original.gif
So lets say you wanted to score top marks for george bush related keywords , you would just get a kyword list add .jpg on the end of every keyword add <img src=http://yourserver.com/example/ in front of every keyword and post it on a page and voila you have hundreds of pictures created on the fly, each with the keywords imprinted on them.
p.s. sloppy php code , sowwy im new at it