View Full Version : HDR comes to the masses...

8th Sep 2010, 02:24 PM
iPhone OS 4.1 is out today, including one touch HDR for those with iPhone 4's. I've written a blog post, including a sample photo and will try and get some photos ready for the next Sunday Night Photo Fun....


8th Sep 2010, 02:53 PM
Cool! Umm, what does HDR stand for?

8th Sep 2010, 03:00 PM
The technical: http://en.wikipedia.org/wiki/High_dynamic_range_imaging

The just see it: http://www.flickr.com/groups/hdr/

Note that the Flickr pool includes lots of HDR techniques the phone does not support; they tweak the settings in the manual software to the surreal looking images. All part of the same technology.

8th Sep 2010, 04:15 PM
Gotcha... it was the expansion of the acronym I was really looking for. So basically, it's automatically taking a set of shots at different exposure settings, and merging the results to create a picture that better represents the actual dynamic range of the subject than a single shot could capture. Same deal as the multiple focal length merged pictures, more or less..

Very cool, and certainly one of those "why didn't I think of that?" kind of ideas - which are usually the best ones.

9th Sep 2010, 12:44 AM
Once again, Apple waits a little while and then implements a choice that most users can do easily. When I saw the demo, I was very impressed. The Apple solution is also more realistic, in terms of replicating what the eye sees. Many HDR images look surreal to me.

9th Sep 2010, 09:24 AM
Yeah, the HDR "pro" software lets you tweak all the parameters, and a lot of folks use it to make that "comic book" look by sliding the sliders way to one side or the other. For some images I like it, but I think Apple has something far more useful.

HDR = multiple images for better illumination range
Focus Stacking = multiple images for better depth of focus
Panoramic Stitching = multiple images for better field of view

You can in fact do all of the above all at the same time, obviously with lots of images. Consider a 6 image focus stack, each image being 3 HDR exposures (18 images now), and each of those repeated 4 times to get a panorama, that's 72 images to make a panoramic focus stacked HDR image! One day the software will just do it.

If you haven't seen it, take a look at Microsoft Photosynth. It takes images from the web and auto-stitches them together so they don't even need to be taken by the same camera. This technology will be on your PC in a few more years....


9th Sep 2010, 07:35 PM
It gets better, or worse, depending on your point of view... :)


13th Sep 2010, 02:03 PM
Here’s a site ( http://www.simplycontrast.com/ (http://www.simplycontrast.com/) ) that will enable you to do an HDR photo online from a single photo. For the best results, a RAW image format is best but it will improve a JPG image. Actually, the process is best described as tone mapping but it is darn close to HDR. I played around with it last night and found it very easy to use and the image quality achieved was amazing. Best of all, it’s free and nothing is downloaded to your PC.