If you want to protect your images and content from directly being copied and saved, then you can disable the right click on your website. This extension will help to protect your content from being copied. In Joomla, you can use a system plugin which can help you do this. You can even pop up a message if somebody is trying to the right click on the page.
Right Click Disable is an extension which can help you to disable visitors or users to right-click on your page which can help you to protect your content from directly being copied.