After installing ssl certificate images won’t show

I suppose you have Adaptive Images plugin installed?

The author suggests for now:

Can you check if the urls in your admin Settings > General page do
contain the “https” instead of “http”? They should contain the “https”
and (sorry about this inconvenience) you need to update your Adaptive
Images settings one more time after this.

Also, for a proper and complete migration from HTTP to HTTPS, I would
advice performing a url rewrite in your database, which will replace
each and every url of your domain from “http” to “https”.

But this is a fresh problem so there’s a possibility that this solution will not work 100%, so I recommend to watch that thread. You can also disable this plugin until this problem is fixed by the author and maybe that will solve your problem for now.