WebHDR Roll-Your-Own
The following page allows you upload a series of up to 9
exposure-bracketed images onto our server where they will be
processed. The results that you'll get back are:
- HDR images with the dimensions of the uploaded ones in RADIANCE RGBE,
OpenEXR and JPEG-HDR format;
- If the uploaded images are larger than 800x600: HDR images in 800x600 in RADIANCE RGBE,
OpenEXR and JPEG-HDR format;
- A false colour image in JPEG format (800x800 pixels, plus 100px legend on the left-hand side);
- An interactive luminance map. This displays the scene's luminance reading for each
pixel on top of the falsecolor image as the mouse is moved around (HTML page with JavaScript).
The back-end software running on this server is
Greg Ward's hdrgen (see under Software).
Please note that not all digital
cameras are supported with this automated process due to flaky implementations
of the EXIF information stored in the image header by the camera's
manufacturer. If in doubt, check the Camera Compatibility page
first.
READ THIS!
In order to produce exposure bracketed images successfully, please
follow the simple rules below:
- Know your camera. Be familiar with the Aperture Priority and Manual modes.
- Use a tripod or rest your camera against a fence, wall or similar.
- Try to avoid having objects and people moving through your scene
during exposures.
- Make sure the brightest image in the series is not all white
and the darkest one not fully black.
- Switch off automatic white-balancing as it could lead to incorrect results.
- 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.
- If you would like to increase the accuracy of the results, please
read up on Camera Calibration.
Yes, I understand everything that is explained above.
No, this is all too much for me.
Last modified 25 September 2007, 12:31 GMT
WebHDR