Sintel Scanner 16 bit to 8 bit

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Evgeni

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  • Real Name: Evgeni Mihailovich

Sintel Scanner 16 bit to 8 bit

PostWed Dec 29, 2021 3:24 am

Hi,
When exporting 16-bit scans in .cri format to an 8-bit container, the histogram changes a lot
Sourse 4096 3072 https://drive.google.com/file/d/1SKpmNC ... sp=sharing

Histogram
16 bit.png
16 bit.png (51.16 KiB) Viewed 920 times

8 bit.png
8 bit.png (67.34 KiB) Viewed 920 times


And it doesn't matter if the color of the space transform changes on the Sineon film log.

What should be done to make the histogram smooth?

Thanks
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Gavin Lucas

Blackmagic Design

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Re: Cintel Scanner 16 bit to 8 bit

PostTue Jan 04, 2022 5:15 pm

Hi Evengi,
Can you detail how you are 'exporting to a 8 bit container'... - what file format is this in (?), as it looks like a sub sample issue?
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Evgeni

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Re: Sintel Scanner 16 bit to 8 bit

PostSun Jan 16, 2022 10:29 pm

Hi Gavin,
In any container!
CRI. source https://drive.google.com/file/d/1SKpmNC ... sp=sharing
If you carry out color correction, the situation will worsen.
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Gavin Lucas

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Re: Sintel Scanner 16 bit to 8 bit

PostMon Jan 24, 2022 2:55 pm

Hi,


Resolve is optimised for 16bit processing, and therefore all color grading should be done on source .cri for optimum performance, the sub sampling seen on a post processed 8 bit image is expected behaviour.
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Evgeni

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Re: Sintel Scanner 16 bit to 8 bit

PostTue Jan 25, 2022 2:19 am

Hi,
Are you familiar with the concept of Dither?)
http://avisynth.nl/index.php/Dither_tools
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James Little

Blackmagic Design

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Re: Sintel Scanner 16 bit to 8 bit

PostThu Jan 27, 2022 2:07 am

Hi Evgeni,

I chatted to the Resolve team about this, their recommendation is 10 bit or higher. Can you repeat your process on a 10bit render and confirm it looks ok, at which point that's as far as our help for you can go.

Let us know if 10 bits still has issues and I'll chat to them about it.

Thanks
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Evgeni

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Re: Sintel Scanner 16 bit to 8 bit

PostThu Jan 27, 2022 6:47 am

Hi,

I was asking about 8 bits!

Thanks

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