Lost something?

Look and you will find it; what is unsought will go undetected. - Sophocles

I looked on Google Images for "undetected" - amid the images of war, espionage, tumours, and graphs of various kinds, this image from a early surveillance camera in California in the 1990s: "HOV lane violator with undetected child":

One of those almost incomprehensible images that have an abstract, compelling quality...

And "unsought" yielded

which we're told is a Radiohead album cover, but reminds me of