HuskyPup - the basic,
1. have you tried with filter of,
2. site:yourdomain.comimage search
3. check robots.txt
bounce rate for your end image, where a larger version of your images are, is about 82% am i right and most visits came to those end images?, that was the reason why I changed my whole site, be cause I thought that would be a panda issue with this bi bounce rate.