I'm able to load an image on a Visualforce page using either tag below:
<img id="theImage" src="{!URLFOR($Action.Attachment.Download, attachment.id)}"/>
<apex:image url="/servlet/servlet.FileDownload?file={!attachment.id}"/>
The same Visualforce page loaded in Salesforce1 is unable to display the image, is it possible to load such an image in SF1 from my Visualforce page?