The value of the src attribute is really an URL, not just a path name. You could try specifying a
file URL:
<img src="file:///home/erp/iimage1.png" />
But really, what you're trying to do is a bit strange, some people would even call it wrong. You're making the browser look for an image file on the local harddisk. If you browse to the webpage from an arbitrary other client computer, the browser will try to find the image on the local harddisk of that client computer, not on the server. Why would you want to do that?