According to wikipedia, HDR is “a set of techniques that allows a greater dynamic range of luminances between light and dark areas of a scene than normal digital imaging techniques. The intention of HDR is to accurately represent the wide range of intensity levels found in real scenes ranging from direct sunlight to shadows.“
Digital has made the creation of HDR images a lot easier, since many cameras now include an auto bracketing mode, which allows the photographer to make many images of the scene using different exposures. It is not uncommon for an HDR photographer to blend together 3 or even 5 images to create an image that is able to give good representation of both the light and dark areas of the image.
I’ve always been a bit of an opponent to HDR photography, for no other reason that I believe(d) that it should be possible to get an aesthetically pleasing shot without the need for excessive post processing in digital imaging software afterwards. Additionally, many of the early users of HDR techniques maybe didn’t understand what they were doing, so ended up creating unrealistic, over the top representations of a scene, giving the whole HDR scene a bad name (at least in my opinion).
However, a friend of mine, Philip, who goes by the name of milliped on Flickr, has been a long time user of HDR, and the results he comes out with aren’t that bad (in fact, they’re mostly very impressive!). Recently we were out together on a recent photo trip around Rotterdam harbour. It was a pretty grey day, and ‘normal’ photos were coming out a bit dull, so I decided to give HDR a go…..
I chose to use Aperture Priority Mode on the camera (which I typically do for most daytime photography) and exposed at -2, -1, 0, 1, and 2EV deviation on the base exposure reading. This left me with 5 shots of each scene, and when I reached home, all I would need to do would be to combine the images in Photomatix, and I would be able to create my HDR image.
I have been a long time follower of Trey Ratcliffe’s Stuck in Customs blog, and I knew he had an excellent tutorial on how to get started, so I downloaded a copy of Photomatix, paid my license fee, and read the tutorial. (Incidentally you can get a discount on the purchase of Photomatix if you visit Trey’s website and use the discount code he has there)
The generation of the HDR image can take a while, especially on a slower computer, and once it has been generated won’t look that impressive. The next step however is to click on ‘Tone Mapping’ in the main menu, which will start the main work to get the HDR looking good.
The options available here are numerous, and Trey’s tutorial provides a lot more detail on how to use them than I will write here, but suffice to say, you can have a lot of fun playing around. So far I have not needed to do much more than up the strength to between 80 and 100, increase saturation a bit to maybe Â±70, and adjust my white and black points to improve exposure. Sometimes I will play with luminosity, or adjust smoothing to High or Very High, and from time to time the other settings may be changed also, but there is no real right or wrong way of going about it – just play until you find a mix that works for you!
So after making a couple of shots and converting them back home on the computer, my impression of HDR imaging has changed. Although I won’t be using it for every shot I make from now on, I can definitely see uses for it, and will be keeping it in my toolbox as one more tool to use to improve the results I am able to get out of my camera.