Photoblog to Yoast XML Sitemap or SEO

Hi,
some time ago you told me that I have to check the page source code for alt-Tags. Well, for some albums or galleries the alt-tags are there, for some not. In that latter case, they are in the rendered page.
Gmedia integrates quite well with Yoast SEO plugin. Are there any plans to feed the images also to the xml-sitemap of Yoast? I did that already for desire and phantom. That works as there is html-sourcecode ($content) available to parse on server side. But this doesn’t work for Phantom.
Hope to get some support here.
Regards
Martin