Geek Creativity

An inspired geek is a balanced geek.

Tuesday, April 10, 2007

Day 16: The pros and cons of HDR

Spurred on from my HDR experiment from the previous day, I wanted to make another attempt to get a dramatic, highly detailed picture. However, I discovered that there are some times where the HDR rendering of a scene isn't necessarily better than a simply contrast-masked picture of the same scene, it's just different.

Bridging the Charles River - Watertown, MA


Contrast-masked
bridge
This photo was processed using the properly exposed photo and this contrast masking tutorial.

Pros:
  • Deeper shadows
  • Reflections in the water are sharper
  • Waves in the river are sharper
  • Sky looks more realistic
Cons:
  • Bridge detail is lost
  • Sun reflection is pretty flat
  • Sun breaking through the clouds is lost

HDR

bridge-hdr
The HDR rendering of the photo was created using 13 (I think) different exposures, Photoshop CS2's "Merge to HDR" command, and and Photomatix tone mapping filter plugin.

Pros:
  • Slightly dreamy effect
  • Bridge gains detail
  • Light reflection in the water has more color on the outside
  • Sun is shown breaking through the clouds in places
  • The color of the bridge is shown
Cons:
  • Moving water is blurred
  • Reflections are more blurred
  • Instead of revealing detail, some detail was actually lost in the bright spots of the reflections
  • Some sky detail is lost
Which one is a better picture? It all depends on taste, and the photo you were trying to achieve. I keep looking at both pictures side by side, and I can't even decide on my own. HDR is a great technique to expand your photo processing repetoire, but shouldn't be looked at as the only way to make a scene look great.

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