Why is this DNG processing smeared and JPG not?

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nick123
Posts: 8
Joined: 18.10.2020 22:32

Why is this DNG processing smeared and JPG not?

Post by nick123 »

I noticed that stacking with DNGs in this case has significant smearing whereas the result from in-camera JPGs is sharp in comparison. It appears that aligning has not worked well. This fragment is towards the edge of the image but all parts seem to suffer to some degree. This was with C2 but B84 and C4 gave similar results.

The shot was on an XT2 with focus bracketing using the smallest lens shift and electronic shutter. Although the gold area is quite shiny, there are plenty of high contrast areas. Attached is the JPG stacked reference, DNG and difference from JPG and DNG fragments aligned to the bottom right. Helicon alignment was using default settings. Choosing the slowest alignment settings gave no benefit.

Catherine, any suggestions to explain why the JPG processing was better in this case, and settings to try adjusting?

JPG
led-strip-jpg-fragment.png
led-strip-jpg-fragment.png (1.16 MiB) Viewed 832 times
DNG
led-strip-dng-fragment.png
led-strip-dng-fragment.png (1.14 MiB) Viewed 832 times
DIFF
led-strip-error-fragment.png
led-strip-error-fragment.png (1.38 MiB) Viewed 832 times
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Catherine
Posts: 1163
Joined: 29.04.2019 22:38

Re: Why is this DNG processing smeared and JPG not?

Post by Catherine »

Could you please send us source files in .dng and .jpeg? We'll be happy to have a closer look at it.
You can upload it to any file storage service and send us the link to support@heliconsoft.com, or upload it to http://office.heliconsoft.com/cloud/ind ... i8a2L8Zawn
nick123
Posts: 8
Joined: 18.10.2020 22:32

Re: Why is this DNG processing smeared and JPG not?

Post by nick123 »

Thanks Catherine, email with link sent.
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