pingmag.jp— HDR is where you combine multiple exposures of the same scene to create a surreal, hyper-detailed image. These HDR images of Tokyo look like Gotham City...
Apr 14, 2006View in Crawl 4
HDR is used all the time in movies, actually. I believe they have (expensive) cameras that take HDR pictures directly, rather than having to do multiple shots with different exposure settings. Industrial Light & Magic has even developed a standard image format called OpenEXR (<a class="user" href="http://www.openexr.com/)">http://www.openexr.com/)</a> and an open-source set of tools for reading and writing OpenEXR image files.These photos are a strange use of HDR, though. They're taking HDR images (in the form of a set of LDR images at different exposure settings) and squashing them into an LDR final image. That's called "tone mapping" -- adjusting brightnesses in a non-linear way so that you can have a really bright object in your picture without making everything else nearly black, or have a really dim object without making everything else really white. But HDR itself isn't about tone mapping, it's about preserving the true brightness of everything in the original scene.Take a look at the "OpenEXR Samples" page on the OpenEXR website, and compare the groups of images shown there. If you have access to a Unix/Linux system, install exrdisplay yourself and download the sample photoset. It's pretty impressive -- in photography terms, you can choose the exposure you want *after* you take the picture.
Pretty ironic if you ask me. People using camera techniques that make the real images look fake. And people using Photoshop to make fake images look realistic.
"In computer graphics and cinematography, high dynamic range imaging (HDRI for short) is a set of techniques that allow a far greater dynamic range of exposures than normal digital imaging techniques. The intention is to accurately represent the wide range of intensity levels found in real scenes, ranging from direct sunlight to the deepest shadows.This provides the opportunity to shoot a scene and have total control of the final imaging from the beginning to the end of the photography project. An example would be that it provides the possibility to re-expose. One can capture as wide a range of information as possible on location and choose what is wanted later.Gregory Ward is widely considered to be the founder of the file format for high dynamic range imaging. The use of high dynamic range imaging in computer graphics has been pioneered by Paul Debevec. He is considered to be the first person to create computer graphic images using HDRI maps to realistically light and animate CG objects."<a class="user" href="http://en.wikipedia.org/wiki/High_dynamic_range_imaging">http://en.wikipedia.org/wiki/High_dynamic_range_imaging</a>
those pics look totally awesome!!! i could really get addicted to something like that. you can even make your pics look artistic so that people can think that you're like a genius or something.
Thanks Weakling, much appreciated.Cheers.The pics have my 7yr old fascinated - this afternoon we're going to do our own first HDR's.... let's hope it turns out into something more or less decent hehe.Thx again Weakling... ;)
Actaully HDR is more of a super real perspective on reality. It is what our eyes sees. We may not notice that the human eye can actually see the world this sharp but it can.
wyzardApr 14, 2006
HDR is used all the time in movies, actually. I believe they have (expensive) cameras that take HDR pictures directly, rather than having to do multiple shots with different exposure settings. Industrial Light & Magic has even developed a standard image format called OpenEXR (<a class="user" href="http://www.openexr.com/)">http://www.openexr.com/)</a> and an open-source set of tools for reading and writing OpenEXR image files.These photos are a strange use of HDR, though. They're taking HDR images (in the form of a set of LDR images at different exposure settings) and squashing them into an LDR final image. That's called "tone mapping" -- adjusting brightnesses in a non-linear way so that you can have a really bright object in your picture without making everything else nearly black, or have a really dim object without making everything else really white. But HDR itself isn't about tone mapping, it's about preserving the true brightness of everything in the original scene.Take a look at the "OpenEXR Samples" page on the OpenEXR website, and compare the groups of images shown there. If you have access to a Unix/Linux system, install exrdisplay yourself and download the sample photoset. It's pretty impressive -- in photography terms, you can choose the exposure you want *after* you take the picture.
glidedonApr 14, 2006
Pretty ironic if you ask me. People using camera techniques that make the real images look fake. And people using Photoshop to make fake images look realistic.
llbblApr 14, 2006
"In computer graphics and cinematography, high dynamic range imaging (HDRI for short) is a set of techniques that allow a far greater dynamic range of exposures than normal digital imaging techniques. The intention is to accurately represent the wide range of intensity levels found in real scenes, ranging from direct sunlight to the deepest shadows.This provides the opportunity to shoot a scene and have total control of the final imaging from the beginning to the end of the photography project. An example would be that it provides the possibility to re-expose. One can capture as wide a range of information as possible on location and choose what is wanted later.Gregory Ward is widely considered to be the founder of the file format for high dynamic range imaging. The use of high dynamic range imaging in computer graphics has been pioneered by Paul Debevec. He is considered to be the first person to create computer graphic images using HDRI maps to realistically light and animate CG objects."<a class="user" href="http://en.wikipedia.org/wiki/High_dynamic_range_imaging">http://en.wikipedia.org/wiki/High_dynamic_range_imaging</a>
wolver1neApr 14, 2006
Some images on Flickr are nice, but I'm not that really amazed by those Tokyo ones. Nice technique tho, I guess.
blinkgreenApr 15, 2006
those pics look totally awesome!!! i could really get addicted to something like that. you can even make your pics look artistic so that people can think that you're like a genius or something.
stockwellApr 15, 2006
Thanks Weakling, much appreciated.Cheers.The pics have my 7yr old fascinated - this afternoon we're going to do our own first HDR's.... let's hope it turns out into something more or less decent hehe.Thx again Weakling... ;)
freedomwvJun 17, 2008
Tokyo`s dark side very cool. For some dark Tokyo history google girl in cement. The story will shock you.
freedomwvJun 17, 2008
Actaully HDR is more of a super real perspective on reality. It is what our eyes sees. We may not notice that the human eye can actually see the world this sharp but it can.