Here&#x27;s a worst case test image for chroma subsampling:<p><a href="https:&#x2F;&#x2F;commons.wikimedia.org&#x2F;wiki&#x2F;File%3ARicardo_Quaresma_%28L%29%2C_Pablo_Zabaleta_%28R%29_%E2%80%93_Portugal_vs._Argentina%2C_9th_February_2011.jpg" rel="nofollow">https:&#x2F;&#x2F;commons.wikimedia.org&#x2F;wiki&#x2F;File%3ARicardo_Quaresma_%...</a><p>I first saw this in Fabrice Bellard&#x27;s BPG demonstration at <a href="http:&#x2F;&#x2F;xooyoozoo.github.io&#x2F;yolo-octo-bugfixes&#x2F;" rel="nofollow">http:&#x2F;&#x2F;xooyoozoo.github.io&#x2F;yolo-octo-bugfixes&#x2F;</a> (&quot;Soccer Players&quot;). Every lossy format fails to reproduce the red dots on the green stripe because they all use chroma subsampling. Until I see tools that can automatically deal with images like this I think the anti-subsampling attitude mentioned in the article is correct. &quot;Unless you are willing to evaluate each image, the thinking goes, you should avoid subsampling.&quot;