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ASU Now - OLLI Petroglyph

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PHOENIX - October 2, 2019 - ASU Now - OLLI Petroglyph - Mathew Peeples explains the reflectance transformation imaging technique, by using a camera and two black spheres in front of a frog petroglyph, at the Osher Lifelong Learning Institute's class at the Deer Valley Petroglyph Preserve, Wednesday, October 2, 2019. Associate Professor Peeples guided the three-hour session on 'The Art of Rock Art,' by talking about the prehistoric people scratching their drawings into the basalt stones and showing two photographic techniques to create high-resolution and 3-D images to highlight the faded works. Photo by Charlie Leight/ASU Now

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20191002 OLLI Petroglyph 288.jpg
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Copyright Arizona Board of Regents
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5965x3977 / 19.2MB
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PHOENIX - October 2, 2019 - ASU Now - OLLI Petroglyph - Mathew Peeples explains the reflectance transformation imaging technique, by using a camera and two black spheres in front of a frog petroglyph, at the Osher Lifelong Learning Institute's class at the Deer Valley Petroglyph Preserve, Wednesday, October 2, 2019. Associate Professor Peeples guided the three-hour session on 'The Art of Rock Art,' by talking about the prehistoric people scratching their drawings into the basalt stones and showing two photographic techniques to create high-resolution and 3-D images to highlight the faded works. Photo by Charlie Leight/ASU Now