How to optimize your images for Google image search (part 3)?

We have already given you two tips on how to optimize your images on Google Image Search, here is another one.
Make Your Image folder accessible to search engines
Be sure that your robots.txt file does not limit search engines from accessing your images files. As a matter of fact, this is very important if you want that your images got ranked on Google.
Moreover, if you want to improve your ranking in Google Image Search, you can also add a non javascript link (direct link) to the source of your picture.
Like this, Google will immediatly know where to find it.
If you are afraid someone could steal your image, then add a copyright on it, but do not protect the whole content of the directory, as you are sure Google will never find you...