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High Dynamic Range (HDR) Digital Photography

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High Dynamic Range (HDR) Digital Photography - PowerPoint PPT Presentation


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High Dynamic Range (HDR) Digital Photography. Jim Reynolds Feb 22, 2010. Example 1. Example # 2. Example #3. Example #4. Example #5. About HDR Effects. Renders the scene as the photographer saw it Captures large range of exposure values (Ev)

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Presentation Transcript
about hdr effects
About HDR Effects
  • Renders the scene as the photographer saw it
  • Captures large range of exposure values (Ev)
  • Captures highlight detail in underexposed images
  • Captures shadow detail in overexposed images
  • Controls noise in shadows
  • Final images have wonderful color & infinite detail
general hdr process steps
General HDR Process Steps
  • Take 3 – 7 exposures at different Ev
  • Load exposures into HDR Program (file conversion may be necessary)
  • Run HDR creation step (Generates 32 bit image)
  • Run Tone Mapping step (Reduces image to 16 bit)
  • Post process image for tones, saturation, etc
camera set up
Camera Set Up
  • Camera on sturdy tripod with cable release
  • Set camera program to Aperture Priority
  • Turn off automatic settings such has White Balance, Autofocus, flash and ISO
  • Set ISO to low value to reduce noise
  • Use Manual focus
  • Continuous shooting mode
  • Raw 12 bit files
hdr shooting
HDR Shooting
  • Compose and shoot one image as normal
  • Then shoot 1 image at – 2 Ev
  • Then shoot 1 image at + 2 Ev
  • Or if available, use camera’s Automatic Exposure Bracketing (AEB) to shoot 3 rapid exposures (Canon)
  • On certain Nikon models, shoot 5 – 7 AEB exposures at 1 EV increments each
credits
Credits
  • Complete Guide to HIGH DYNAMIC RANGE Digital Photography by Ferrell McCollough
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