Photo Editing Information

I need someone who can modify a set of pictures (10-12 pictures). The problem is that those pictures are indexed by google images and other image search engine. If I chose to search by image with one of the photo's google will display the website which contains those photos. I need someone to modify those photo's so they don't appear on google images when I search them. I have tried myself to change colors, resize, add some text, change the exif but google images still detect them. I think it's more like a fingerprint of the photo that it needs to be modified. Please bid only if you know what this is about. We are looking for a long term relationship since we will have set's of photos each 2-3 days. We have a budget of 20$ for a 10 pictures set (2$/photo)