going from dng to tiff 16bit in adobe yields a 61 mb file.

[markc2]

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Hi All, 

I'm not sure why it does this, but when you convert a DNG file to 16bit tiff in adobe the file size from the dng expands to 61mb. Is this real data? 

Mark

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[frame-it]

the dng prolly had lossless compression

[01af]

vor 7 Stunden schrieb markc2:

... expands to 61 MB. Is this real data?

Yes, sure it is.

10 MP × 3 channels (RGB) × 16 bit per pixel and channel = 60 MB. Add some metadata and embed a small JPEG preview image, and you'll arrive at 61 MB. That's what demosaiced uncompressed 16-bit RGB TIFF data is.

Raw data is just 8 bit, or one byte, of (compressed) data per pixel, so a DNG file is 10 MB plus preview image plus metadata = approx. 11 MB.

Edited May 21, 2024 by 01af

[3D-Kraft.com]

vor 20 Stunden schrieb markc2:

Is this real data?

Don't know, what you mean with "real". @01af already explained, what happens behind the scenes, when you convert it to that format. So, it's real, but no gain of information compared to the raw file.

[frame-it]

20 hours ago, markc2 said:

real data? 

 

DNG_Spec_1_7_1_0.pdf