by GTM (M. Alreshaid) on flickr.
by vgm8383 on flickr.
By Larthrows on flickr.
An Introduction to High Dynamic Range Imaging (HDR)
HDR, or High Dynamic Range Imaging seems to be all the rage these days. HDRI is described by Wikipedia as:
In image processing, computer graphics and photography, high dynamic range imaging (HDRI) is a set of techniques that allows a greater dynamic range of exposures
(the range of values between light and dark areas) than normal digital imaging techniques. The intention of HDRI is to accurately represent the wide range of intensity levels found in real scenes ranging from direct sunlight to shadows. (from Wikipedia)
More accurately however, the images that are commonly seen and referred to as HDR or HDRI images are tone-mapped.
Tone mapping is a technique used in image processing and computer graphics to map a set of colours to another; often to approximate the appearance of high dynamic range images in media with a more limited dynamic range. Print-outs, CRT or LCD monitors, and projectors all have a limited dynamic range which is inadequate to reproduce the full range of light intensities present in natural scenes. Essentially, tone mapping addresses the problem of strong contrast reduction from the scene values (radiance) to the displayable range while preserving the image details and color appearance important to appreciate the original scene content.
Find more information here and here along with tutorials to create your own HDR photographs using Photoshop.
From the Estetica Design & Photography Forum
Find more information here and here along with tutorials to create your own HDR photographs using Photoshop.
From the Estetica Design & Photography Forum
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