Lena
For as long as I can remember, articles on scaling images have been accompanied by proofs of prowess by scaled versions of one particular image of a particular lady, apparently called "Lena", either in black & white or in color. A quick google will bring you hundreds of projects that have one or another version in their repositories. Who started using this image? Where did it come from?
At least it's a fairly tasteful image, not like some of the images the first KImageShop developers used to showcase KImageShop. But to keep in with the wider tradition, I've started to use lena to unittest our prescaled canvas projection code. Which code is giving me considerable trouble...