High Dynamic Range Photography
High dynamic range (HDR) photography delivers a combination a range of images of the same composition into a single photograph, adding a
momentous amount of data per pixel (a typical digital image has 8 color bits of data per pixel; while an HDR image holds 32). This result in an
image with containing dynamic range. Meaning, the brights are more brilliant, the darks are deeper, and there's significantly more variance
Mouse over the image above to see it before High Dynamic Range was Applied
A case in point is a HDR tone-mapped image shown above HDR applied to a hum drum Stockton city street. A typical tone-mapped image may take as
many as nine exposures. By combining photography, computer graphics and image processing, HDR becomes a technique that provides a superior
dynamic luminance range between the dark and light zones of an image than customary digital imaging methods,
in this case, adding new life to a boring photograph. Mouse over the image to see the boring before. The intent of HDR is to truthfully depict
the wide intensity level ranges existing in real scenes which could range from bright sunlight to dark shadows.
Topaz Adjust is a fantastic tool for creating HDR photographs.When I first downloaded a trial versionof Topaz Adjust, I instantly prefered it over CS3, it's simpler and quicker, I also believe it does a superior job with shadows, mid-tones, and saturation. "Topaz Adjust is a plugin that I and numerous other photographers exclusively use because of it's numerous creative and interpretative adjustments. You can make fantastic HDRs with Topaz Adjust as does a superior job of depicting shadow detail over the local adaptation algorithm contained in Photoshop, and yields images with a unique ethereal appearance. Topaz Adjust is seasoned software, supported by a technical team, that's ready to lend a hand and I highly recommended it.
HDR imaging initially was developed by Charles Wyckoff in the 1930s into the 1940s Wyckoff's in depth images of nuclear explosions were shown on the covers of Life magazine during the mid 1940s. The progression of tone mapping using bracketed exposures of typical digital images, results in a high, often overstated dynamic range, was initially talked about in 1993, and a mathematical theory resulting uniquely exposed images of identical subject matter was first published by Rosalind Picard and Steve Mann in 1995 . This technique of unite several uniquely exposed images to fabricate a solitary HDR image was offered to the public interested in computer graphics by Paul Debevec in 1997.
This method was created to fabricate an HDR image obtained using a set of pictures shot from an array of exposures. Since the increased attraction to digital cameras and simple-to-deploy desktop publishing software, the HDR term is now often employed to describe to this procedure. This composite procedure is unique from (and can be of poorer or better quality than) the creation of a photograph from a solitary exposure using an image sensor with a built-in high dynamic range. Additionally tone mapping is used to depict HDR images on mechanisms with a low level native dynamic range, like a computer screen.
Oct 16, 2011