DNG conversion lossy compression rate setting

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  • Updated 2 months ago
DNG converter is a great tool but I'd love if it offered to choose how much lossy compression to apply.

The thing is I noticed on noisy high ISO photos the default lossy image compression is working very well, even putting the lossy image on top of the original file with difference blending mode and cranking up the exposure on that difference to 10+ EVs it is marginal:

On low ISO images it actually compresses the image a lot getting very nice small files but the difference can be seen just zooming in, and using the difference method it's actually quite noticeable even at +5 EVs and even more at 10:

One even greater feature would be to auto select a compression rate checking how much difference there would be between the original raw file and the generated DNG or maybe auto selecting a compression rate by noise levels.

Thanks in advance, and keep on with the great work: comparing lossy compression today to lossy compression in 2014 shows how much of a long way you've gone.

p.s.: please add 24mpixel to lossy compressed sizes, thank you :)
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Giovanni Bertelli

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Posted 2 months ago

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