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Picture of the day

Valerie Thomas (born 1943) is an American scientist and inventor. She invented the illusion transmitter, for which she received a patent in 1980, and was responsible for developing digital image processing systems used in the early years of the Landsat program, a satellite-imagery program run by NASA and the United States Geological Survey. This photograph, taken in 1979, depicts Thomas standing next to a stack of early Landsat computer compatible tapes.Photograph credit: NASA; restored by Adam Cuerden