4 ms·
Weird that the mars rover has a coin embedded as a scale reference instead of a printed ruler scale?
by wdfx 2y ago
Weird that the mars rover has a coin embedded as a scale reference instead of a printed ruler scale?
- jvanderbot 2y agoMaybe coins are easier to extract, and bonus might provide color information. But I didn't know a coin was used either.
- defrost 2y agoA linear scale lacks aspect ratio, they'd want at least a right angled scale. That said, there's a long tradition of using circles and checkerboards that goes back to early BBC TV broadcasts transmitting a tuning pattern. The coin used is a circle, likely has "interesting" patterns, and perhaps even has raised and gouged features that the stereo paired cameras can height resolve (and calibrate against for when examining rocks).
- midjji 2y agoIts just for fun.