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JPEG-HDR is a format we will be seeing alot of in the near future. It was developed by of the fathers of Radiance/HDR - Greg Ward. It's HDR thats compressed with JPEG encodings. Quality can be set like any other JPEG - the difference being its a container/wrapper that is aslready viewable on the Internet (backwards compatible), but also contains HDR information.
Current applications such as CS2 and HDRshop do not support reading the headers from these files. The file format is too new for them.
The only application I am aware of that can read the file headers is the Mac-based Photosphere which has been released for free at Ward's website:
http://www.anyhere.com/
A command-line builder (HDR to JPEG-HDR Converter) for Mac and Linux is also available there. A command-line builder for Windows is available on the Brightside website here (yes Chris Nichols - I was wrong about the monitors as I heard it from Ward himself - sorry):
http://www.brightsidetech.com/products/process.php If you download this and want to use it, add the .exe to your environment path and read the accompanying docs. Batch encoding did not work for me.
I managed to compress a 25,520 MB HDR I created down to 1,480 MB at a very respectable 85% quality. Again, the only problem is that no viewer for Windows has been publicly released. Photoshop and other applications treats it as a regular Jpeg.
So I just wanted to plant some seeds as a possibility in implementing JPEG-HDR in Vray down the road. I think it's a matter of just being able to read the headers and recognize it contains floating point information. You could see how it could lead to some very big advantages from a memory consumption/file-size stand-point.
You can read more about Ward's research here:
http://www.anyhere.com/gward/papers/cic05.pdf
Current applications such as CS2 and HDRshop do not support reading the headers from these files. The file format is too new for them.
The only application I am aware of that can read the file headers is the Mac-based Photosphere which has been released for free at Ward's website:
http://www.anyhere.com/
A command-line builder (HDR to JPEG-HDR Converter) for Mac and Linux is also available there. A command-line builder for Windows is available on the Brightside website here (yes Chris Nichols - I was wrong about the monitors as I heard it from Ward himself - sorry):
http://www.brightsidetech.com/products/process.php If you download this and want to use it, add the .exe to your environment path and read the accompanying docs. Batch encoding did not work for me.
I managed to compress a 25,520 MB HDR I created down to 1,480 MB at a very respectable 85% quality. Again, the only problem is that no viewer for Windows has been publicly released. Photoshop and other applications treats it as a regular Jpeg.
So I just wanted to plant some seeds as a possibility in implementing JPEG-HDR in Vray down the road. I think it's a matter of just being able to read the headers and recognize it contains floating point information. You could see how it could lead to some very big advantages from a memory consumption/file-size stand-point.
You can read more about Ward's research here:
http://www.anyhere.com/gward/papers/cic05.pdf
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