Thursday, July 05, 2007
High Dynamic Ranging?
In computer graphics and photography, high dynamic range imaging (HDRI) is a set of techniques that allow a far greater dynamic range of exposures (i.e. a large 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 the deepest shadows.
HDRI was originally developed for use with purely computer-generated images. Later, methods were developed to produce a HDR image from a set of photos 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 to refer to the process of tone mapping together bracketed exposures of normal digital images, giving the end result a high, often exaggerated dynamic range; however, in this case neither the input nor the output qualify as "true" HDRI.
Recently, CMOS image sensor producers have begun to release sensors with HDR up to 110 db for security cameras.
Text taken from http://en.wikipedia.org/wiki/High_dynamic_range_imaging
Below are few samples of HDR pictures.
How do I do it? It's quite simple actually. Well, based on the tutorial. I have not tried it personally yet. Try http://www.cre-aid.nl/2006/06/13/hdr-high-dynamic-range-workshop/. If you're not satisfied, go google for "high dynamic ranging". Have a nice day!
HDRI was originally developed for use with purely computer-generated images. Later, methods were developed to produce a HDR image from a set of photos 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 to refer to the process of tone mapping together bracketed exposures of normal digital images, giving the end result a high, often exaggerated dynamic range; however, in this case neither the input nor the output qualify as "true" HDRI.
Recently, CMOS image sensor producers have begun to release sensors with HDR up to 110 db for security cameras.
Text taken from http://en.wikipedia.org/wiki/High_dynamic_range_imaging
Below are few samples of HDR pictures.
How do I do it? It's quite simple actually. Well, based on the tutorial. I have not tried it personally yet. Try http://www.cre-aid.nl/2006/06/13/hdr-high-dynamic-range-workshop/. If you're not satisfied, go google for "high dynamic ranging". Have a nice day!
# posted by zerowindez : 11:18 PM
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