Digital Photography

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Digital Photography
Dr. M. M. Yagoub Department of
GeographyFaculty of Humanities and Social
SciencesUnited Arab Emirates UniversityP. O.
Box 17771, Al-Ain United Arab Emirates Tel
00971-3-7064-674 (O)Tel
00971-3-7612-316 (H)Fax
00971-3-7671-706 E-mail myagoub_at_uaeu.ac.ae E-
mail myagoub_at_hotmail.com URL
http//www.angelfire.com/mo/yagoub
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Digital/Softcopy photogrammetry

• Softcopy photogrammetry is based on digital
  (softcopy) raster image as distinct from
  conventional photogrammetry, based on film
  (hardcopy) images
• Digital systems are considered third generation
  photogrammetric instruments (workstation-Digital
  image Analytical Plotter -DiAP), after analytical
  (second generation) and analog (first generation)
  stereo-plotters
• Equipment used in digital photogrammetry include
  Computer, Scanner, CCD cameras, LCD Eyewear
  (stereo viewing)
• Orthophoto and Digital Elevation Model (DEM) can
  be generated from Softcopy photogrammetry

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Comparison of photographic versus Electronic
image processing
Characteristic Photographic Electronic
Data capture Silver halide Solid state
Data storage film Magnetic, optical, and solid state media
Data manipulation Chemical developing and optical printing Digital image processing
Data transmission Mail, delivery, fax Telemetry, telephone, computer network
softcopy display Projected slides or movies Monitor, television, projection video
Hard copy display Silver halide prints Inkjet, thermal, and laser printers/plotters