GEOG 330 Chapter 3 - Aerial Photography A Brief...

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Aerial Photography A Brief Introduction
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History of photography ! What was needed was the integration of several technological components to come into being. These components included: " (1) A correct theory of light & color ; " (2) A recording instrument ; and, " (3) A permanent light sensitive emulsion “Photography was an invention waiting to happen from 1833 to 1839” (Jensen, 2007:61)
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History of photography ! 4 th c. BC : the camera obscura invented in China & Greece " The device uses a simple lens inserted into a dark box to focus images on a mirror & then onto a plate of glass ! Note : its images were not permanent Theory of light & color Recording instrument Permanent emulsion Depiction of a camera obscura
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History of photography ! 1666 : Newton was the first “to scientifically document the spectral nature of light ” (Jensen, 2007:61) " Using a prism, Newton first separated white light into a spectrum of colors. Using another prism, Newton then recombined the colors into white light. Theory of light & color Recording instrument Permanent emulsion Depiction of how a prism works
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History of photography ! 1826 : Niepce produced the world’s first photographic image (called a heliograph ) " Eight hour exposure of a metal plate of pewter coated with an emulsion of bitumen of Judea (asphalt); portions exposed to light hardened; removed soft bitumen by washing the plate in lavender oil & white petroleum Theory of light & color Recording instrument Permanent emulsion The world’s first permanent photograph (i.e., remotely sensed image)
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History of photography ! 1839 : Daguerre, the daguerreotype process, & the ‘Sun-drawn miniature " A polished silver plate was plated onto a sheet of copper and made light sensitive by exposing it to the vapors of iodine in
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This note was uploaded on 01/16/2012 for the course GEOG 330 taught by Professor Marsh during the Fall '07 term at University of Arizona- Tucson.

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GEOG 330 Chapter 3 - Aerial Photography A Brief...

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