The first thing I noticed was the positioning of the Adsense. I'm sure you will get more clicks with the Adsense placed at the top and preferably to the left rather than right. That is where the eye naturally looks first. Also consider changing to one post per page. This will mean that the ads produced will be more targeted towards whatever text you put with the pictures, and therefore more likely to be clicked on. It probably is a good idea to change the theme to one which blends in with the pictures. You can experiment here because it is easy enough to change back, or try another one. If you put the Adsense at the top of each page, consider putting an ad for an affiliate program on the bottom, something from PayDotCom or CJ. I like the pictures - keep them coming!
Pics are cool < but you need to use a simple theme for site , i didnt like Background < it must be in light colors