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DP2m: first images, first problems

Started Oct 28, 2015 | Discussions thread
xpatUSA
xpatUSA Forum Pro • Posts: 23,017
Re: Preliminary Analysis

Marek L wrote:

I've converted your image in SPP 6.3 in neutral colour mode with no adjustments and there is no significant blotching visible on hi-res screen.

full size jpg from spp

what can be seen as uniform colour area in the sky/mist is a result of jpg interpolation of pixels with no signifcant colour difference into a one blop . That's how jpg compression works to reduce the file size .

Can I ask what JPEG quality setting you used for the above image?

Reason I ask is that EXIF for yours says YCbCR 4:2:0 meaning that it has sub-sampling but Claudio's JPEG says YCbCR 4:4:4 meaning it has no sub-sampling and, therefore, no interpolation. That puts his SPP slider setting at 9+ and yours probably less?

No disrespect intended to your raw conversion . . .

Sorry, please forget the question, your original size is in 4:4:4 (not sub-sampled) same as Claudio's. Apparently, DPR uses lower quality when downsizing the original to the post image. Sure fooled me

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Ted

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