I think I have already seen it in a couple of recent posts about image compression. (Fits perfectly the definition of Baader-Meinhof phenomenon [1].)
[1] https://en.wikipedia.org/wiki/List_of_cognitive_biases#Frequ...
Lenna does IMO not contain enough sharp edges and contrasts to highlight the differences between the different resize techniques.
With Bologna, you can clearly see the problems with a nearest-neighbour approach. I'm not sure that would have been equally visible with lenna.
Bu the way, thank you fo pointing out that this is Bologna! I'm going to Italy at the end of the month, can visit it :-)