Your Eyes Suck at Blue...

The fetching lass at right is Traci, whose entire involvement with this post is as a demonstrater model – for an interesting visual phenomenon that has some real-world implications for how we store and display photographs.

The gist of this notion is that our eyes pick up very little detail in blue. More precisely, our spatial resolution in blue is far worse than it is in green (especially) or red. This means that an image's actual quality in blue isn't very important to our perception of it – and that means there's a compression opportunity.

Check out the all the details in this excellent article.