> In fact, when I showed this article to Kornel Lesiński (who actually knows what he's talking about when it comes to image compression), he was unhappy with my F1 comparison above, because the DDSIM score of the JPEG is much lower than the others, meaning it's closer in quality to the original image, and… he's right.

> I struggled to compress the F1 image as JPEG. If I went any lower than 74 kB, the banding on the road became really obvious to me, and some of the grey parts of the road appeared slightly purple in a noticeable way, […]

> The fine detail of the road is lost in all of the compressed versions, which I'm ok with. However, you can see the difference in detail Kornel was talking about. Look at the red bodywork in the original, there are three distinct parts – the mirror, the wing connecting the bargeboard, and the top of the sidepod. In the AVIF, the smoothing removes the division between these parts, but they're still mostly there in the JPEG, especially the 74 kB version.