[tweetmeme]HDR or High Dynamic Images can store pixel values that span the whole tonal range of the real world, in the range of 100,000:1. HDR Images are encoded in a format that allows the largest range of values stored with 32 bits per color channel.
According to Wikipedia: high dynamic range imaging (HDRI or just HDR) is a set of techniques that allow a greater dynamic range of luminance between the lightest and darkest areas of an image than standard digital imaging techniques or photographic methods. This wider dynamic range allows HDR images to more accurately represent the wide range of intensity levels found in real scenes, ranging from direct sunlight to faint starlight
HDR images enable photographers to record a greater range of tonal detail than a given camera could capture in a single photo. While many imaging experts regard HDR photography as the future of digital photography, the discipline has long been in existence.
The “merge to HDR” feature of Photoshop allows the photographer to combine a series of exposures into a single image, which encompasses the tonal detail of the entire series.
Here is a list of 5 of the best HDR tutorials in Photoshop. The 2 last tutorials “fakes” HDR with only one image.
1. HDR – High Dynamic Range Photography. Merging HDR in Photoshop CS3-CS4 Tutorial
Learn how to shoot, merge and tone-map photos to extend the dynamic range and produce those painted looking results. Covers Photoshop CS3,
2. Photoshop HDR
This is an article about Photoshop HDR imaging. The following HDR workflow is explained in detail:
Merging photos to an HDR image
Processing the HDR image
3. HDR Style Results Using Layers in Photoshop
If you are not a fan of the results HDR give, but like the idea of it, read on. The process I am about to talk you through has essentially the same premise, but will give a more realistic finished
4. Fake HDR in Photoshop
This HDR Photoshop tutorial shows quite easy way to fake HDR photos in Photoshop. You don’t need to shoot into RAW or take multiple photos – one JPEG file is enough.
5. Photoshop Tutorial: Pseudo HDR
In this tutorial I will show to how to transform any JPG photo in a HDR type of photo.
Another great articles about HDR
The Future of Digital Imaging
What are HDR or High Dynamic Range Images? http://brajeshwar.com/2006/what-are-hdr-or-high-dynamic-range-images/
Adobe Photoshop CS3 Tutorial – HDR – High Dynamic Range