Re: [darktable-user] Creating HDR images

[Niranjan Rao]

Thank you. I'll try it out.

I did manage to find few interesting tags from exif information - just 
by comparing tag information between three images shot by camera for hdr 
vs single image. It looks promising for one of my camera. Did not get 
enough time yet to investigate if same concept can be applied to other 
camera.


Now debating over Java vs (bash) shell script to get exif info and 
collect the potential images I'm interested in.


Regards,

Niranjan
On 8/23/19 6:56 PM, William Ferguson wrote:

To use the lua scripts do the following

Open a terminal then:

cd .config/darktable
git clone https://github.com/darktable-org/lua-scripts lua
ln -s lua/tools/script_manager.lua luarc

start darktable
a module will be present at the lower left called script manager.  
Open it, select the scripts you want to run and enable them, and enjoy


There is more information at 
https://github.com/darktable-org/lua-scripts/readme.md


Bill

On Fri, Aug 23, 2019 at 8:13 PM Niranjan Rao > wrote:


Greetings,

On darktable version 2.6.2, Ubuntu 18.04.


I know how to generate HDR images in darktable, basically select
images
from lighttable and under selected images menu, click on create HDR.
This works.


However it's getting tedious for doing many images and getting error
prone. So, I'm exploring batch options. Anyone has any ideas? I'm
comfortable writing shell scripts or Java code if needed. I have not
explored darkable/Lua combination yet.


For batch mode I see I have to do following

Figure out images which can be grouped together for HDR. I don't
know if
cameras write any special tag in raw file that might help. If not,
only
option seems to be check tags like time stamp, focal length and such
that will remain same. For my purposes, these fields most likely
will do
the job and get me the names of the file unless I find a better
way to
identify the images.


Once I have managed to find the group, next task is convince
darktable/lua to create HDR from the selected images. This is
where I am
stuck. Quick search revealed
https://github.com/darktable-org/lua-scripts which has few promising
leads e.g. enfuse. I'm not clear how to use it.


Looking for any pointers/help.


Thanks in advance,


Niranjan


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Re: [darktable-user] Creating HDR images

[Terry Pinfold]

Hi All,
 I am using DT on a windows computer and really loving the experience. 
Great job by all the compilers. However, I have a friend who has a Mac computer 
and edits in ProPhoto color profile. DT and Mac do not seem to work together to 
give the correct colors in this profile yet they are perfect on my Windows 
computer. Is this a known issue, is there a workaround or fix? Help would be 
really appreciated.

Dr Terry Pinfold
Cytometry & Histology Lab Manager
University of Tasmania
17 Liverpool St, Hobart, 7000
Ph 6226 4846 or 0408 699053

From: David Vincent-Jones 
Sent: Saturday, 24 August 2019 12:18 PM
To: darktable-user@lists.darktable.org 
Subject: Re: [darktable-user] Creating HDR images


https://photographylife.com/iso-invariance-explained<https://photographylife.com/iso-invariance-explained>

You might want to look at this article regarding Invariance. Many/most recent 
cameras have invariant sensors that allow the subject ISO to be modified in 
post production. base-curve/fusion in dt makes use of invariance in a similar, 
but simplified, manner to HDR but using just a single image. You may find this 
interesting as a means of DR extension.

David

On 8/23/19 5:13 PM, Niranjan Rao wrote:
Greetings,

On darktable version 2.6.2, Ubuntu 18.04.


I know how to generate HDR images in darktable, basically select images from 
lighttable and under selected images menu, click on create HDR. This works.


However it's getting tedious for doing many images and getting error prone. So, 
I'm exploring batch options. Anyone has any ideas? I'm comfortable writing 
shell scripts or Java code if needed. I have not explored darkable/Lua 
combination yet.


For batch mode I see I have to do following

Figure out images which can be grouped together for HDR. I don't know if 
cameras write any special tag in raw file that might help. If not, only option 
seems to be check tags like time stamp, focal length and such that will remain 
same. For my purposes, these fields most likely will do the job and get me the 
names of the file unless I find a better way to identify the images.


Once I have managed to find the group, next task is convince darktable/lua to 
create HDR from the selected images. This is where I am stuck. Quick search 
revealed 
https://github.com/darktable-org/lua-scripts<https://github.com/darktable-org/lua-scripts>
 which has few promising leads e.g. enfuse. I'm not clear how to use it.


Looking for any pointers/help.


Thanks in advance,


Niranjan


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University of Tasmania Electronic Communications Policy (December, 2014).
This email is confidential, and is for the intended recipient only. Access, 
disclosure, copying, distribution, or reliance on any of it by anyone outside 
the intended recipient organisation is prohibited and may be a criminal 
offence. Please delete if obtained in error and email confirmation to the 
sender. The views expressed in this email are not necessarily the views of the 
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Re: [darktable-user] Creating HDR images

[David Vincent-Jones]

https://photographylife.com/iso-invariance-explained

You might want to look at this article regarding Invariance. Many/most 
recent cameras have invariant sensors that allow the subject ISO to be 
modified in post production. base-curve/fusion in dt makes use of 
invariance in a similar, but simplified, manner to HDR but using just a 
single image. You may find this interesting as a means of DR extension.


David

On 8/23/19 5:13 PM, Niranjan Rao wrote:

Greetings,

On darktable version 2.6.2, Ubuntu 18.04.


I know how to generate HDR images in darktable, basically select 
images from lighttable and under selected images menu, click on create 
HDR. This works.



However it's getting tedious for doing many images and getting error 
prone. So, I'm exploring batch options. Anyone has any ideas? I'm 
comfortable writing shell scripts or Java code if needed. I have not 
explored darkable/Lua combination yet.



For batch mode I see I have to do following

Figure out images which can be grouped together for HDR. I don't know 
if cameras write any special tag in raw file that might help. If not, 
only option seems to be check tags like time stamp, focal length and 
such that will remain same. For my purposes, these fields most likely 
will do the job and get me the names of the file unless I find a 
better way to identify the images.



Once I have managed to find the group, next task is convince 
darktable/lua to create HDR from the selected images. This is where I 
am stuck. Quick search revealed 
https://github.com/darktable-org/lua-scripts which has few promising 
leads e.g. enfuse. I'm not clear how to use it.



Looking for any pointers/help.


Thanks in advance,


Niranjan

 


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to unsubscribe send a mail to 
darktable-user+unsubscr...@lists.darktable.org





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to unsubscribe send a mail to darktable-user+unsubscr...@lists.darktable.org

Re: [darktable-user] Creating HDR images

[William Ferguson]

To use the lua scripts do the following

Open a terminal then:

cd .config/darktable
git clone https://github.com/darktable-org/lua-scripts lua
ln -s lua/tools/script_manager.lua luarc

start darktable
a module will be present at the lower left called script manager.  Open it,
select the scripts you want to run and enable them, and enjoy

There is more information at
https://github.com/darktable-org/lua-scripts/readme.md

Bill

On Fri, Aug 23, 2019 at 8:13 PM Niranjan Rao  wrote:

> Greetings,
>
> On darktable version 2.6.2, Ubuntu 18.04.
>
>
> I know how to generate HDR images in darktable, basically select images
> from lighttable and under selected images menu, click on create HDR.
> This works.
>
>
> However it's getting tedious for doing many images and getting error
> prone. So, I'm exploring batch options. Anyone has any ideas? I'm
> comfortable writing shell scripts or Java code if needed. I have not
> explored darkable/Lua combination yet.
>
>
> For batch mode I see I have to do following
>
> Figure out images which can be grouped together for HDR. I don't know if
> cameras write any special tag in raw file that might help. If not, only
> option seems to be check tags like time stamp, focal length and such
> that will remain same. For my purposes, these fields most likely will do
> the job and get me the names of the file unless I find a better way to
> identify the images.
>
>
> Once I have managed to find the group, next task is convince
> darktable/lua to create HDR from the selected images. This is where I am
> stuck. Quick search revealed
> https://github.com/darktable-org/lua-scripts which has few promising
> leads e.g. enfuse. I'm not clear how to use it.
>
>
> Looking for any pointers/help.
>
>
> Thanks in advance,
>
>
> Niranjan
>
>
> 
> darktable user mailing list
> to unsubscribe send a mail to
> darktable-user+unsubscr...@lists.darktable.org
>
>


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[darktable-user] Creating HDR images

[Niranjan Rao]

Greetings,

On darktable version 2.6.2, Ubuntu 18.04.


I know how to generate HDR images in darktable, basically select images 
from lighttable and under selected images menu, click on create HDR. 
This works.



However it's getting tedious for doing many images and getting error 
prone. So, I'm exploring batch options. Anyone has any ideas? I'm 
comfortable writing shell scripts or Java code if needed. I have not 
explored darkable/Lua combination yet.



For batch mode I see I have to do following

Figure out images which can be grouped together for HDR. I don't know if 
cameras write any special tag in raw file that might help. If not, only 
option seems to be check tags like time stamp, focal length and such 
that will remain same. For my purposes, these fields most likely will do 
the job and get me the names of the file unless I find a better way to 
identify the images.



Once I have managed to find the group, next task is convince 
darktable/lua to create HDR from the selected images. This is where I am 
stuck. Quick search revealed 
https://github.com/darktable-org/lua-scripts which has few promising 
leads e.g. enfuse. I'm not clear how to use it.



Looking for any pointers/help.


Thanks in advance,


Niranjan


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Re: [darktable-user] Creating HDR images

[Urs Schütz]

On 04/10/18 17:54, Niranjan Rao wrote:

On Ubuntu 16.04, darktable 2.4.1

I have experimented with "selected images/ create HDR" and happy with 
the results. I have setup my camera to do bracketing and I select three 
raw images from the camera manually and click on create HDR button.



Is there anyway to automate the process - may be with the aid of lua 
script or something as it's getting tedious to do the same thing for 
large number of images.



I was thinking some command line script where I can pass three file 
names to darktable and darktable will create HDR files from these. I can 
(relatively) easily write a script where I can get the file triplets, 
but don't know how ask darktable to combine these three and create HDR 
file.



Is there any way to specify where HDR output files will be created? 
Otherwise, I am getting lot of duplicate looking images in my lighttable 
view.



Regards,


Niranjan



Not a direct answer, but maybe enfuse from 
http://enblend.sourceforge.net/index.htm will be an easier solution..
I configured enfuse as an editor within geeqie (mime definition), select 
the images to blend, and right-click - edit - enfuse them. Pretty simple 
and fast.
I do not know weather this works with raw files. I convert raw files 
before using enfuse.


Urs

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[darktable-user] Creating HDR images

[Niranjan Rao]

On Ubuntu 16.04, darktable 2.4.1

I have experimented with "selected images/ create HDR" and happy with 
the results. I have setup my camera to do bracketing and I select three 
raw images from the camera manually and click on create HDR button.



Is there anyway to automate the process - may be with the aid of lua 
script or something as it's getting tedious to do the same thing for 
large number of images.



I was thinking some command line script where I can pass three file 
names to darktable and darktable will create HDR files from these. I can 
(relatively) easily write a script where I can get the file triplets, 
but don't know how ask darktable to combine these three and create HDR file.



Is there any way to specify where HDR output files will be created? 
Otherwise, I am getting lot of duplicate looking images in my lighttable 
view.



Regards,


Niranjan


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