> Please don't fulminate. Please don't sneer, including at the rest of the community.

> Please respond to the strongest plausible interpretation of what someone says, not a weaker one that's easier to criticize. Assume good faith.

> Eschew flamebait. Avoid generic tangents. Omit internet tropes.

https://news.ycombinator.com/newsguidelines.html

If not by the pixels, how else could you assess the quality of an image?