I use NextGEN Gallery and Yoast WP SEO.
How to rename the images code in order to solve the permanent error - "The images on this page are missing alt tags" from Yoast WP SEO ?
Now, my images looks like this:
[singlepic id=81 w=320 h=240 float=center]
On Gallery/Manage Gallery i set Alt & Title Text attributes for all my images!