I'm not exactly understanding your concern. Are you saying that because they're image pages, they have shallow content and therefore must be bad for Panda? Or is it that they have too many ads?
Sorry, I'm not sure I explained the page setup very well.
These pages all have 300-400+ words of textual content, which I would describe as
shallow. When created, the pages were intended for the traditional 'web search' - and did rank well. The images were there to compliment the textual content, so basically an addition to the original pages.
Post-Panda - the web search for these pages tanked, yet the image searches held (possibly improved).
So basically, its apparent Goog dislikes the textual content (valid), yet likes the image content (valid). I therefore want to keep the images ranking well but at the same time remove the offending text.
To go into even more specifics... the pages discuss types of 'products' - yet do not actually sell the products. I believe there has been some recent discussions about the SERPS categorising these pages to a greater degree i.e. more divide between informational and transactional keyphrases, which does make sense.
Thank you for the input so far, it's been helpful.
I think the solution may be to 301 the existing pages to new dedicated 'image pages' in more of a gallery format - with the addition of new relevant/useful text.