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 HDRI - High dynamic range imaging

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Toxico
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PostSubject: HDRI - High dynamic range imaging   Thu May 22, 2008 11:17 am

High dynamic range imaging

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.

High Dynamic Range Imaging was originally developed in the 1930s and 1940s by Charles Wyckoff. Wyckoff's detailed pictures of nuclear explosions appeared on the cover of Life magazine in the early 1940s. The process of tone mapping together with bracketed exposures of normal digital images, giving the end result a high, often exaggerated dynamic range, was first reported in 1993[1], and resulted in a mathematical theory of differently exposed pictures of the same subject matter that was published in 1995[2]. In 1997 this technique of combining several differently exposed images to produce a single HDR image was presented to the computer graphics community by Paul Debevec.

This method was developed to produce a high dynamic range image from a set of photographs taken with a range of exposures. With the rising popularity of digital cameras and easy-to-use desktop software, the term "HDR" is now popularly used[3] to refer to this process. This composite technique is different from (and may be of lesser or greater quality than) the production of an image from a single exposure of a sensor that has a native high dynamic range. Tone mapping is also used to display HDR images on devices with a low native dynamic range, such as a computer screen.

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PostSubject: Re: HDRI - High dynamic range imaging   Thu May 22, 2008 11:32 am



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PostSubject: HDRI-Studio   Fri May 23, 2008 6:33 pm



HDRI-Studio provides unique, real
professional photo studio lighting environments
for your computer graphics models.


Combining the specialist skills of experienced still-life photographers with state-of-the-art, High Dynamic Range imaging, you can now have the ultimate in photorealism. You no longer have to worry about incongruous reflections in shiny surfaces or struggle for realistic lighting. Everything is exactly as it should be.

The High Dynamic Range images can be used to capture and record a much wider range of brightness values than regular image formats. With up to 96 bits per pixel, it can have millions of brightness levels instead of the more usual 256 – making it an ideal choice for rendering with image-based lighting.




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PostSubject: Re: HDRI - High dynamic range imaging   Mon Feb 16, 2009 9:47 pm



HDR Light Studio™ allows you to produce stunning studio photography style computer renderings of jewellery, packaging, new products, cars - in fact any 3D data that requires great lighting and reflections.

Your 3D render software is like a virtual camera. HDR Light Studio™ generates the HDR images to wrap around your subject matter - lighting it and reflecting in it, all in a physically accurate way - providing a virtual lighting set that mimics real studio techniques.

HDR Light Studio™ is ideal for users of Bunkspeed® HyperShot™ but can be used with any renderer that uses HDR images for lighting and reflections, whether it’s a real time technology or not!

HDR Light Studio™ has been designed for professionals looking to take their visualisation standards to the next level. Off the shelf HDR images and photo editors can not compete with the ease of use and versatility of this powerful software.

The HDR Light Studio™ interface.
Just one easy to learn window - that's it!



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