Lecture 08: High Dynamic Range Photography

A135 L08: HDR Photography (Part 1) from Grant Adams on Vimeo.

A135 L08: HDR Processing in Photoshop (Part 2 of Lecture) from Grant Adams on Vimeo.

To view the lecture slides or to download a .pdf of the lecture, click one of the links below.

Lecture Notes for Lecture 8: HDR Photography

HDR Photography

High Dynamic Range

  • A set of techniques that allow a greater dynamic range of luminances between the lightest and darkest areas of an image
  • Image: http://www.oreillynet.com/

High Dynamic Range

  • A set of techniques that allow a greater dynamic range of luminances between the lightest and darkest areas of an image
  • Image: www.studioshadowlight.com

Why?

  • To more accurately represent the wide range of light intensity levels found in real scenes
  • To mimic how the human eye sees a scene (which cannot be captured in traditional photographs)
  • Image: www.jamie-katz.com

Tone Mapping

  • Reduces overall contrast to facilitate display of HDR images on devices with lower dynamic range
  • Can be applied to produce images with preserved or exaggerated local contrast for artistic effect.
  • Image: www.illiteratewithdrawal.com

Tone Mapping (continued)

  • Reduces the dynamic range, or contrast ratio, of the entire image, while retaining localized contrast (between neighboring pixels)
  • Image: www.hdrsoft.com

Software Choices

  • Photoshop
    • Merge to HDR automated action
    • Post processing necessary to get desired results (curves, levels, masking,etc.)
    • No built in tone mapping Available on lab computers PC/Mac
  • Photomatix
    • Considered to be gold standard in HDR tone mapping
    • Plugins for Photoshop, Lightroom, Aperture or Standalone Application
    • $100-$200 (depending on version, but academic pricing (60% off) for students)
    • PC/Mac
    • Image: prolineimagery.blogspot.com
  • Essential HDR (community edition)
    • Great tone mapping Free to use
    • Limited size (resolution) of output unless you pay
    • PC only
    • Image: imagingluminary.com

Examples

Links

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