WebHDR Roll-Your-Own

The bad news

This page used to provide an upload form for turning a sequence of exposure-bracketed photographs into HDR images and false colour luminance maps. This functionality is currently not available.

Please see the RYO-Demo pages for an example. The back-end software running on this server is Greg Ward's hdrgen (see under Software).

The good news

Researcher at the Institute of Computing at the University of Campinas in Brazil have created their own version of WebHDR, which they call the Light Photo Analyzer.


In order to produce exposure bracketed images successfully, please follow the simple rules below:

  1. Know your camera. Be familiar with the Aperture Priority and Manual modes.
  2. Use a tripod or rest your camera against a fence, wall or similar.
  3. Try to avoid having objects and people moving through your scene during exposures.
  4. Make sure the brightest image in the series is not all white and the darkest one not fully black.
  5. Switch off automatic white-balancing as it could lead to incorrect results.
  6. Don't post-process the images before submitting them to WebHDR. Use the originals. Most image processing software alters or even discards the EXIF header information which is vital for the software to determine the exposure.
  7. If you would like to increase the accuracy of the results, please read up on Camera Calibration.

The Light Photo Analyzer is currently in beta. You can try it out by clicking on this link