Code:

<img src="/tmp/Energy_and_Power_on_Target-img.png">

the src has to be accessable from the internet/intranet. /tmp is not.


You would have to add an Alias to you httpd.conf(apache) file in the correct place.

Code:

Alias /tmp/ "/tmp/"

This would link http://www.somedomain.com/tmp to /tmp

But Im not sure you really want to do this. Why are you storing images in tmp? this is a "temporary" place to images and could be wiped at anytime, usually on reboot.