As you know google images is a great way to get traffic for your website. just when you add a photo on your page dont forget to write your keyword on image alt tag, for example :
<img src="here must be your image source link" alt="keyword 1, keyword 2, keyword photo, keyword photos">
if you code your images on your website you will get a great results on google image search results but when they click on the image on google image search results they go to your page but there is a frame on the top. but using a little javascript you can redirect your visitors to your website. ( for examle see http://images.google.com/images?gbv=2&hl=en&q=saglik.bildigim.com&btnG=Search+Images ) and this is not illegal for google or even google adsense.
script you must use is
<script language='JavaScript' type='text/javascript'>
if (top.location != self.location) top.location = self.location;
</script>