A ‘real-time data translator’ machine converted a Mariner 4 digital image data into numbers printed on strips of paper. Too anxious to wait for the official processed image, employees from the Voyager Telecommunications Section at NASA’s Jet Propulsion Laboratory, attached these strips side by side to a display panel and hand colored the numbers like a paint-by-numbers picture. More.
Official website of the Lunar Orbiter Image Recovery Project (LOIRP)