Dji Mavic 3 and Mini 3 images with heavy vignette?!?

[Christopher Fenton]

All my raw dng images when loaded into ptgui have a heavy vignette and are causing issues with the exposure blend. 

They do not have the vignette in lightroom or when viewed in the finder window on a mac. 

This is driving me insane. How can i turn the vignette off?

[PTGui Support]

Hi Christopher,

The DJI drones have very severe vignetting, but lightroom is able to
correct this very well. You can convert your DNGs to TIFF in lightroom,
and stitch those in PTGui.

Kind regards,

Joost Nieuwenhuijse
www.ptgui.com

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[roger...@redgeworld.com]

I process all my DNGs in DXO photolab first, it has the camera profile for the mavic 3 and corrects distortion, vignetteing as well as removing noise

[Christopher Fenton]

I’ve done the lightroom process and that works great. It’s just creating tiff files three times the size. But it’s a fix for now. 

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[Erik Krause]

Am 14.07.2022 um 21:36 schrieb Christopher Fenton:

> It’s just creating tiff files three times the size. But it’s a fix
> for now.

Conversion to tiff files is better not only for this reason. You should
do it for all raw files.

Simply delete them after the panorama is successfully stitched and keep
the DNGs. You can re-create the TIFFs any time again.

--
Erik Krause
http://www.erik-krause.de

[Christopher Fenton]

Ok I did try that but didn’t think that worked. Will have another go but it’s a whole sequence in the 6 years Ive been using ptgui I’ve not needed to do. 

You had this nailed with the P4 and mavic2. 

Many thanks 

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[Philip Chong]

In converting from DNG to TIFF files, you lost the real DNG setting.

For example, in DNG, the Temperature is 2000 to 50000.

After converting to TIFF, the Temperature is now -100 to 100, just like a JPG file.  You lost alot of data.

What can be done about this?

[Erik Krause]

Am 18.07.22 um 05:50 schrieb Philip Chong:

> For example, in DNG, the Temperature is 2000 to 50000.
>
> After converting to TIFF, the Temperature is now -100 to 100, just like a
> JPG file. You lost alot of data.

DNG contains raw sensor data, which needs an absolute color temperature
to be converted into an image. After this conversion you can adjust only
in relative values. Best is to do your conversion at 5200K, which is
almost always correct for outdoor images, especially through sunset and
sunrise. If you really need to adjust this later, either redo your
conversion or use the relative adjustment on the final panorama.

--
Erik Krause

[Philip Chong]

From what I understand, as long as you are in range of the Temperature and Tint, the TIFF is about to handle it.

I was hoping PTGui is able to keep all the raw sensor data and understand DNG instead of convert to TIFF. Possible or impossible?

[Erik Krause]

Am 18.07.22 um 19:33 schrieb Philip Chong:

> I was hoping PTGui is able to keep all the raw sensor data and understand
> DNG instead of convert to TIFF. Possible or impossible?

You won't be happy with the exact sensor data, it's a mess usually, and
far from directly usable. It needs to be developed into an image first.
If this is done correctly, you get the full dynamic range of the raw
image, which should provide enough latitude to do further corrections
afterwards.

Raw conversion is more of an art and there are man-years of work in a
good raw converter. I hope Joost won't dive into this since there is no
point doing this work again, while good raw converters already exist.

--
Erik Krause