Camera Raw: DNG Converter Issue with Nikon D810

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  • Updated 7 months ago
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I found an issue with how DNG converter converts Nikon D810 NEF files. NEF image size is 7380x4928 and doesn't have any masked pixels. The final size of the image after processing is 7360x4912, which means that there is a padding of 10 pixels on top and bottom and 8 pixels on left and right of the image. However, the image in the DNG has a size of 7372x4920. That should not happen, since there are no masked pixels in the NEF file. Moreover, DNG says that the crop origin is at 12x8. That leaves zero padding at the right and bottom of the image for CFA interpolation. This is confirmed by the dng_validate.exe tool in the DNG SDK, which outputs this:

 

*** Warning: Too little padding on right edge of CFA image (possible interpolation artifacts) ***

*** Warning: Too little padding on bottom edge of CFA image (possible interpolation artifacts) ***

 

I am using the latest DNG converter (10.2.0.894). Has anybody else noticed this? Any chances this is going to get fixed soon? Not a huge issue, but this should be really easy to fix. I don't want to use Nikon's CaptuerNX, I never have.

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Marian Trandafir

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Posted 7 months ago

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Photo of Todd Shaner

Todd Shaner, Champion

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Do you get the same results if using the LR Export module or PS ACR 'Save Image' as DNG?
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Marian Trandafir

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The only LR I have access to is standalone version 5.7 with Camera Raw 8.7, and I get the same results with it.
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Todd Shaner, Champion

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OK, I checked a Nikon D810 DNG file created in LR Classic 7.1 and it's showing in EXIF data as 7372x4920, Default Crop Origin 12 8, and Default Crop Size 7360x4912.

Crop area =     12  8
Crop Origin =   12  8 (Upper Left-Hand Corner)
Left Border  =   12
Right Border =  0 (No padding)
Top Border  =         8
Bottom Border =  0 (No padding)

I checked  a Nikon D800 DNG created in LR Classic 7.1 and it's showing and it's showing in EXIF data as 7378x4924, Default Crop Origin 8 6, and Default Crop Size 7360x4912

Crop Area = 18  12
Crop Origin = 8    6 (Upper Left-Hand Corner)
L/R Border  = 5
T/B Border  =       3

I can confirm what you are seeing and hopefully Adobe Engineering can as well.