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16-bit: Photivo and Gimp

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16-bit: Photivo and Gimp

rich2005
Hi,

I have Gimp 2.8.16 (Ubuntu 16.04) and I'm trying to edit a 16-bit image the
following way:

1 - Import DNG file into Photivo;
2 - Make adjustments
3 - Open the resulting image in Gimp
4 - Save tiff file

When I edit the Gimp resulting tif file with mediainfo, it says it is a 8-bit
image.

How can I edit and save 16-bit images.

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16-bit: Photivo and Gimp

rich2005
>Hi,
>
>I have Gimp 2.8.16 (Ubuntu 16.04) and I'm trying to edit a 16-bit
>image the following way:
>
>1 - Import DNG file into Photivo;
>2 - Make adjustments
>3 - Open the resulting image in Gimp
>4 - Save tiff file
>
>When I edit the Gimp resulting tif file with mediainfo, it says it is
>a 8-bit image.
>
>How can I edit and save 16-bit images.

Gimp 2.8.x is 8 bit only. Wait for Gimp 2.10 or use the development version Gimp
2.9.x

For 'buntu and derivatives this is easily installed using a PPA. see

https://launchpad.net/~otto-kesselgulasch/+archive/ubuntu/gimp-edge

Updates frequently but is quite stable and usable. This will replace the
existing Gimp 2.8.16 installation.

It is possible to run both if the 2.9 is a 'portable' application. There are a
few around.

Search for appimage. There is a 2.9.3 here that should work in most linux
https://bintray.com/probono/AppImages/  and
https://bintray.com/probono/AppImages/GIMP

I keep an up-to-date 2.9.5 assembled in 'buntu 16.04 that should work in your
installation. Nothing guaranteed though. see

http://www.gimp-forum.net/Thread-Portable-Gimp-2-9-5-for-linux

Used to be a fan of photivo, but development seems to have stalled in 2015. The
gimp plugin stopped working for me. There are other tools, RawTherapapee for
example. If you have photivo from the dhor/myway PPA it is there for
installation.

example in kubuntu 16.04 http://i.imgur.com/tbPx1QP.jpg (but using nUFRaW)

rich: www.gimp-forum.net

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16-bit: Photivo and Gimp

rich2005
>Gimp 2.8.x is 8 bit only. Wait for Gimp 2.10 or use the development
>version Gimp 2.9.x
>
>For 'buntu and derivatives this is easily installed using a PPA. see
>
>https://launchpad.net/~otto-kesselgulasch/+archive/ubuntu/gimp-edge
>
>Updates frequently but is quite stable and usable. This will replace
>the existing Gimp 2.8.16 installation.
>
>It is possible to run both if the 2.9 is a 'portable' application.
>There are a few around.
>
>Search for appimage. There is a 2.9.3 here that should work in most
>linux
>https://bintray.com/probono/AppImages/  and
>https://bintray.com/probono/AppImages/GIMP
>
>I keep an up-to-date 2.9.5 assembled in 'buntu 16.04 that should work
>in your installation. Nothing guaranteed though. see
>
>http://www.gimp-forum.net/Thread-Portable-Gimp-2-9-5-for-linux
>
>Used to be a fan of photivo, but development seems to have stalled in
>2015. The gimp plugin stopped working for me. There are other tools,
>RawTherapapee for example. If you have photivo from the dhor/myway PPA
>it is there for installation.
>
>example in kubuntu 16.04 http://i.imgur.com/tbPx1QP.jpg (but using
>nUFRaW)
>
>rich: www.gimp-forum.net

Wow, great information, thanks!

As for Photivo Gimp plugin you referred to, is it the code that allows the "Send
image to external editor" function?

I'll give a try with RawTherapee, but Photivo, gave me the best results out of
the box, besides offering a ton of options if I want to go further in post
production...

Once more, thanks for the great information

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16-bit: Photivo and Gimp

rich2005
>Wow, great information, thanks!
>
>As for Photivo Gimp plugin you referred to, is it the code that allows
>the "Send image to external editor" function?
>
>I'll give a try with RawTherapee, but Photivo, gave me the best
>results out of the box, besides offering a ton of options if I want to
>go further in post production...
>
>Once more, thanks for the great information

It was the pt..something plugin in Photivio that gave problems, Quite a while
since I last used it.

But stick with Photivo, save as a 16 bit tiff, then open with Gimp 2.9.5

For RawTherapee, use this PPA to get the latest version 5

https://launchpad.net/~dhor/+archive/ubuntu/myway  It is worth enabling anyway,
lots of good stuff there.

RawTherapee will send to Gimp but for a portable Gimp you will need to put the
Gimp location in the RawTherapee preferences. example:
http://i.imgur.com/yG4BjSY.jpg

Truthfully, a bit over the top for me and my requirements. The place for
information is https://discuss.pixls.us/

rich: www.gimp-forum.net

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16-bit: Photivo and Gimp

rich2005
In reply to this post by rich2005
>Wow, great information, thanks!
>
>As for Photivo Gimp plugin you referred to, is it the code that allows
>the "Send image to external editor" function?
>
>I'll give a try with RawTherapee, but Photivo, gave me the best
>results out of the box, besides offering a ton of options if I want to
>go further in post production...
>
>Once more, thanks for the great information

I tried RawTherapee and, together with the new 16-bit Gimp, I can say I found an
excellent replacement for PS.

Just as an example, I could manage to develop the raw image below the way I
would do with PS. I didn't loose much time in the tonal settings, but I was
curious to see if I could enhance the image regarding sharpness and noise. I
think I could.

I did the basics in RawTherapee then opened it in Gimp, where I applied the
smart sharpening method proposed by this fellow that I don't know the name
(http://gimpguru.org/Tutorials/SmartSharpening2/).

Since I'm shooting with an old and humble Canon Powershot A3100 running CHDK,
from where I'm able to get raw images, I can now say that I'm 100% GNU,

http://imgur.com/a/o3o4r

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16-bit: Photivo and Gimp

rich2005
>I tried RawTherapee and, together with the new 16-bit Gimp, I can say
>I found an excellent replacement for PS.
>
>Just as an example, I could manage to develop the raw image below the
>way I would do with PS. I didn't loose much time in the tonal
>settings, but I was curious to see if I could enhance the image
>regarding sharpness and noise. I think I could.
>
>I did the basics in RawTherapee then opened it in Gimp, where I
>applied the smart sharpening method proposed by this fellow that I
>don't know the name (http://gimpguru.org/Tutorials/SmartSharpening2/).
>
>Since I'm shooting with an old and humble Canon Powershot A3100
>running CHDK, from where I'm able to get raw images, I can now say
>that I'm 100% GNU,
>
>http://imgur.com/a/o3o4r

EDIT: The picture I shoot is no master piece, but shooting in raw and having a
good raw developer allowed me to recover details from the big white clouds,
something that on the original jpg shows as blown up white.

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Re: 16-bit: Photivo and Gimp

Pat David
For the best results you might want to consider sharpening in the raw
processor as well. :)
On Fri, Mar 17, 2017 at 12:19 PM oneaty <[hidden email]> wrote:

> >I tried RawTherapee and, together with the new 16-bit Gimp, I can say
> >I found an excellent replacement for PS.
> >
> >Just as an example, I could manage to develop the raw image below the
> >way I would do with PS. I didn't loose much time in the tonal
> >settings, but I was curious to see if I could enhance the image
> >regarding sharpness and noise. I think I could.
> >
> >I did the basics in RawTherapee then opened it in Gimp, where I
> >applied the smart sharpening method proposed by this fellow that I
> >don't know the name (http://gimpguru.org/Tutorials/SmartSharpening2/).
> >
> >Since I'm shooting with an old and humble Canon Powershot A3100
> >running CHDK, from where I'm able to get raw images, I can now say
> >that I'm 100% GNU,
> >
> >http://imgur.com/a/o3o4r
>
> EDIT: The picture I shoot is no master piece, but shooting in raw and
> having a
> good raw developer allowed me to recover details from the big white clouds,
> something that on the original jpg shows as blown up white.
>
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> oneaty (via www.gimpusers.com/forums)
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>
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16-bit: Photivo and Gimp

rich2005
>For the best results you might want to consider sharpening in the raw
>processor as well. :)

Why does it give best results?

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16-bit: Photivo and Gimp

rich2005
>Why does it give best results?

I think the answer os in chain83 post here
https://www.reddit.com/r/postprocessing/comments/38vdao/how_does_everyone_sharpen_their_photos/

According to that, you're suggesting to also apply input sharpening

Thanks for the tip anyway.

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