https Websites Pages
Website pages display pictures by creating a link to that picture in the code. For a website page to retain its https status that link needs to be either
and you will be fine.
if it is
http://yourwebsite/resources/site1/general/yourpicture.jpg - i.e. no s then the page will be displayed with a note saying this page is not secure.
Easy to think - does this really matter? But sites which are secure is one factor which helps encourage Google to send people to your page rather than somewhere else.