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Author Topic: DNG colour shift  (Read 6820 times)

hairyfreak

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DNG colour shift
« on: July 29, 2016, 12:43:06 PM »
Sorry if this is already answered, I couldn't spot it.

Overjoyed to see the addition of DNG support.

However, I'm finding some of my DNG files are a very strange hue of purple pink.

Probably missing something very simple, but I've checked the files, and they don't have any adjustments applied – i.e. I didn't have the white balance set wrong and correct later, though it does happen sometimes.  So it shouldn't be that the metadata is ignored.

Makes a fine model, just one that's pink. I texture it with jpg/tiff exports which is fine, just don't think it's meant to be pink to start with.

Also only seems to be for one of camera models I've tried – the Nikon D3100.
Shot in Raw, converted to DNG with Lightroom CC

I've looked at DNG taken in the same place/day/conversion/settings white balance etc and they are fine. These cameras were
Nikon D700  and D7000 and both look entirely fine.  It's only the D3100 files.

What have I misssed?

Thanks again.


Alexey Pasumansky

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Re: DNG colour shift
« Reply #1 on: August 01, 2016, 11:13:46 AM »
Hello hairyfreak,

If you see think pink color on the DNGs opened in the Photo view mode, please send us any example to support@agisoft.com.
Best regards,
Alexey Pasumansky,
Agisoft LLC

Alexey Pasumansky

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Re: DNG colour shift
« Reply #2 on: August 03, 2016, 01:52:38 PM »
Hello hairyfreak,

Thank you for providing the sample data, the fix will be included in the next update.
Best regards,
Alexey Pasumansky,
Agisoft LLC

bortoman

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Re: DNG colour shift
« Reply #3 on: September 19, 2016, 01:27:51 PM »
Hi, I have a similar problem with the DNG's from a Canon 5D MKIII:

There is some strange color-fringe in my files, that looks a bit like chromatic abberation but it's definitly not!

In the attachments you can see a ca. 200% crop of the center part of a DNG file viewed in adobe camera raw (with no editing) and photocan pro 1.2.6 (Build 2834).
In the more "zoomed" screenshot you can clearly see that there is something strange going on especially in the vertical lines...

Here is the link to download the original DNG file:
https://www.wetransfer.com/downloads/f5687712a3248e97b57851b539c0f85e20160919101530/ede271f78c23a9a45ab81db0a32f912c20160919101530/f779e4



bortoman

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Re: DNG colour shift
« Reply #4 on: September 24, 2016, 01:22:53 PM »
I forgot: same happens wit the original CR2 Canon-RAW file...
download-link for the original CR2 file:
https://we.tl/dHidVVoTNh

PS: I think it would be appropriate to move this topic to "Bug-Reports", i just thought it would be better to reply here instead of opening a new one...

Alexey Pasumansky

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Re: DNG colour shift
« Reply #5 on: October 10, 2016, 10:24:03 PM »
Hello bortoman,

It might be a differnt way of RAW data decoding, we are checking differnt options at the moment.
Best regards,
Alexey Pasumansky,
Agisoft LLC

bortoman

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Re: DNG colour shift
« Reply #6 on: February 05, 2017, 12:39:45 PM »
Hello Alexey,
any news about the issue?


Alexey Pasumansky

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Re: DNG colour shift
« Reply #7 on: February 06, 2017, 06:26:54 PM »
Hello bortoman,

1.3.0 version doesn't contain any changes on this matter.
Best regards,
Alexey Pasumansky,
Agisoft LLC

bortoman

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Re: DNG colour shift
« Reply #8 on: April 05, 2017, 10:49:43 AM »
Hi, i just tried the new 1.3.1 update, but sadly still no progress on the CR2 / DNG files from canon...
The 16bit tiff files are eating up my hdd´s!
And before anyone tells me that jpg´s are almost the same:
yes they are, but if you look at the noise of the dense cloud in the shadows you see a big difference!

rossnixon

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Re: DNG colour shift
« Reply #9 on: April 05, 2017, 01:21:30 PM »
Do you need 16bit images? I drop them to 8bit (per channel), or as I prefer to call it 24bit colour. Then I save as lossless PNG with max internal compression option..

bortoman

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Re: DNG colour shift
« Reply #10 on: April 05, 2017, 01:59:21 PM »
I need to retain all information... the original Raw files are 14bit, so going down to 8bit means to loose information...
I'm sorry, I don't get why CR2 or DNG from Canon still don't work, I guess there might be some proprietary pixel-layout or something, but I can't be the only one needing this...