Google AdSense Says No Images Alongside Ads
Inside AdSense: Ad and image placement: a policy clarification
Google says don’t. They provide a couple of bad examples too. I will say that the examples are pretty obvious. They don’t provide any acceptable examples but they tell you what you can do, as in change the ad colors or put a full border around your ads.
We ask that publishers not line up images and ads in a way that suggests a relationship between the images and the ads. If your visitors believe that the images and the ads are directly associated, or that the advertiser is offering the exact item found in the neighboring image, they may click the ad expecting to find something that isn’t actually being offered. That’s not a good experience for users or advertisers.