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Author Topic: Making synthetic DNG files  (Read 1037 times)
Jim Kasson
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« on: March 11, 2013, 06:29:03 PM »
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I've done some testing on resampling in the past using a combination of actual photographic images and synthetic ones. I am now interested in expanding that work to include raw processing, including demosaicing. For that purpose, I would like to make some synthetic mosaiced images that LR, ACR, and other raw processors can work with. I thought my best shot would be to create the images in the DNG format. I guess I could download the DNG SDK and try to figure it out, but I was wondering if anyone knows of a shortcut, like a program that will take TIFFs and data and turn them into DNGs.

Failing that, does anyone know of a suite of mosaiced test images aimed at catching demosaicing and resolution-changing artifacts?

Thanks,

Jim
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Schewe
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« Reply #1 on: March 11, 2013, 06:38:04 PM »
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LR and ACR will both accept TIFF files and save them as Linear DNG (meaning linear gamma but with demosaiced rendering). Don't know of a way to make a synthetic un-demosaied raw image...
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Vladimirovich
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« Reply #2 on: March 11, 2013, 07:42:20 PM »
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Failing that, does anyone know of a suite of mosaiced test images aimed at catching demosaicing and resolution-changing artifacts?


sure

http://www.libraw.su/data/porcupine.dng
http://www.libraw.su/data/porcupine-blur.dng
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Jim Kasson
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« Reply #3 on: March 11, 2013, 07:56:32 PM »
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Very nice.  Thanks!

Jim
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Schewe
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« Reply #4 on: March 11, 2013, 09:47:18 PM »
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Wow, that's some serious moiré!

:~)
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Bryan Conner
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« Reply #5 on: March 14, 2013, 12:45:49 PM »
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Wow, that's some serious moiré!

:~)

Holy Batmoiré!
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