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batch process jpegs

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  batch process jpegs mick crane <mick.crane@gmail.com> - 2019-05-01 20:00 +0200
    Re: batch process jpegs Jonas Smedegaard <jonas@jones.dk> - 2019-05-01 20:20 +0200
      Re: batch process jpegs mick crane <mick.crane@gmail.com> - 2019-05-02 07:30 +0200
        Re: batch process jpegs mick crane <mick.crane@gmail.com> - 2019-05-02 08:40 +0200
      Re: batch process jpegs Eric S Fraga <e.fraga@ucl.ac.uk> - 2019-05-11 15:30 +0200
    Re: batch process jpegs Joel Roth <joelz@pobox.com> - 2019-05-01 21:00 +0200
      Re: batch process jpegs Jonas Smedegaard <jonas@jones.dk> - 2019-05-01 21:30 +0200
    Re: batch process jpegs Siard <shiems146@kpnplanet.nl> - 2019-05-01 22:20 +0200
      Re: batch process jpegs mick crane <mick.crane@gmail.com> - 2019-05-02 09:40 +0200

#208015 — batch process jpegs

I've got a bunch of jpgs from the camera where the bits I want are a bit 
underexposed. What I'd like is a GUI that will batch process them.
It's been a few years since I processed any camera images and I seem to 
have forgotten what my workflow was.
I think I might be able to do it with Graphic::Magick if I could give it 
some sensible numbers and nip2 looks like it can do it so I'm reading 
the docs for that.
I can't quite see how to use Gimp script-fu thing.
Any suggestions for available GUI that will batch process jpgs ?


mick
-- 
Key ID    4BFEBB31

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#208016

[Multipart message — attachments visible in raw view] — view raw

Quoting mick crane (2019-05-01 19:59:06)
> I've got a bunch of jpgs from the camera where the bits I want are a bit 
> underexposed. What I'd like is a GUI that will batch process them.
> It's been a few years since I processed any camera images and I seem to 
> have forgotten what my workflow was.
> I think I might be able to do it with Graphic::Magick if I could give it 
> some sensible numbers and nip2 looks like it can do it so I'm reading 
> the docs for that.
> I can't quite see how to use Gimp script-fu thing.
> Any suggestions for available GUI that will batch process jpgs ?

The king of photo editing nowadays is darktable - can be confusing to 
navigate at first, but is quite powerful - also does batch processing.

But if you mean shell scripting then you want something else - and for 
each of perl, python, ruby, haskell, java, etc. there is no doubt 
several capable photo processing libraries if you want even more 
"scripting" than shell.  :-)


 - Jonas

-- 
 * Jonas Smedegaard - idealist & Internet-arkitekt
 * Tlf.: +45 40843136  Website: http://dr.jones.dk/

 [x] quote me freely  [ ] ask before reusing  [ ] keep private

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#208024

On 2019-05-01 19:15, Jonas Smedegaard wrote:
> Quoting mick crane (2019-05-01 19:59:06)
>> I've got a bunch of jpgs from the camera where the bits I want are a 
>> bit
>> underexposed. What I'd like is a GUI that will batch process them.
>> It's been a few years since I processed any camera images and I seem 
>> to
>> have forgotten what my workflow was.
>> I think I might be able to do it with Graphic::Magick if I could give 
>> it
>> some sensible numbers and nip2 looks like it can do it so I'm reading
>> the docs for that.
>> I can't quite see how to use Gimp script-fu thing.
>> Any suggestions for available GUI that will batch process jpgs ?
> 
> The king of photo editing nowadays is darktable - can be confusing to
> navigate at first, but is quite powerful - also does batch processing.
> 
> But if you mean shell scripting then you want something else - and for
> each of perl, python, ruby, haskell, java, etc. there is no doubt
> several capable photo processing libraries if you want even more
> "scripting" than shell.  :-)
> 
> 
>  - Jonas

Thanks, Darktable looks awesome and friendly interface. Now I just need 
to find the "apply to all" menu item.

mick


-- 
Key ID    4BFEBB31

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#208026

On 2019-05-02 06:21, mick crane wrote:
> On 2019-05-01 19:15, Jonas Smedegaard wrote:
>> Quoting mick crane (2019-05-01 19:59:06)
>>> I've got a bunch of jpgs from the camera where the bits I want are a 
>>> bit
>>> underexposed. What I'd like is a GUI that will batch process them.
>>> It's been a few years since I processed any camera images and I seem 
>>> to
>>> have forgotten what my workflow was.
>>> I think I might be able to do it with Graphic::Magick if I could give 
>>> it
>>> some sensible numbers and nip2 looks like it can do it so I'm reading
>>> the docs for that.
>>> I can't quite see how to use Gimp script-fu thing.
>>> Any suggestions for available GUI that will batch process jpgs ?
>> 
>> The king of photo editing nowadays is darktable - can be confusing to
>> navigate at first, but is quite powerful - also does batch processing.
>> 
>> But if you mean shell scripting then you want something else - and for
>> each of perl, python, ruby, haskell, java, etc. there is no doubt
>> several capable photo processing libraries if you want even more
>> "scripting" than shell.  :-)
>> 
>> 
>>  - Jonas
> 
> Thanks, Darktable looks awesome and friendly interface. Now I just
> need to find the "apply to all" menu item.
> 
> mick

well that seems to work.
change one of the photos in darktable and it saves the .xmp file
close darktable.

#!/bin/bash
let n=1000
for i in *.JPG
do
darktable-cli $i IMG_7169.JPG.xmp $n.jpg
let n=n+1
done

-- 
Key ID    4BFEBB31

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#208571

On Wednesday,  1 May 2019 at 20:15, Jonas Smedegaard wrote:
> Quoting mick crane (2019-05-01 19:59:06)
>> I've got a bunch of jpgs from the camera where the bits I want are a bit 
>> underexposed. What I'd like is a GUI that will batch process them.

[...]

> The king of photo editing nowadays is darktable - can be confusing to 
> navigate at first, but is quite powerful - also does batch processing.

Thanks for this. I'd forgotten about darktable. Very nice (although
indeed confusing at first, especially as the font size is way too small
on my large monitor).

For the OP, I tend to use 'convert' for shell script manipulation of
images.
-- 
Eric S Fraga via Emacs 27.0.50 & org 9.2.3 on Debian buster/sid

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#208017

mick crane wrote:
> I've got a bunch of jpgs from the camera where the bits I want are a bit
> underexposed. What I'd like is a GUI that will batch process them.
...
> Any suggestions for available GUI that will batch process jpgs ?

Hi Mick,

I would suggest using the command line utility 'convert'
that belongs to imagemagick. 

Batch processing is generally easier to manage at the
command line, even if it takes you an hour to learn 
how to do it.

cheers and HTH

convert -brightness-contrast <params> input-file output-file

docs from https://imagemagick.org/script/command-line-options.php#brightness-contrast

-brightness-contrast brightness
-brightness-contrast brightness{xcontrast}{%}

Adjust the brightness and/or contrast of the image.

Brightness and Contrast values apply changes to the input image. They are not absolute settings. A brightness or contrast value of zero means no change. The range of values is -100 to +100 on each. Positive values increase the brightness or contrast and negative values decrease the brightness or contrast. To control only contrast, set the brightness=0. To control only brightness, set contrast=0 or just leave it off.

You may also use -channel to control which channels to apply the brightness and/or contrast change. The default is to apply the same transformation to all channels.

Brightness and Contrast arguments are converted to offset and slope of a linear transform and applied using -function polynomial "slope,offset".

The slope varies from 0 at contrast=-100 to almost vertical at contrast=+100. For brightness=0 and contrast=-100, the result are totally midgray. For brightness=0 and contrast=+100, the result will approach but not quite reach a threshold at midgray; that is the linear transformation is a very steep vertical line at mid gray.

Negative slopes, i.e. negating the image, are not possible with this function. All achievable slopes are zero or positive.

The offset varies from -0.5 at brightness=-100 to 0 at brightness=0 to +0.5 at brightness=+100. Thus, when contrast=0 and brightness=100, the result is totally white. Similarly, when contrast=0 and brightness=-100, the result is totally black.

As the range of values for the arguments are -100 to +100, adding the '%' symbol is no different than leaving it off.



> 
> mick
> -- 
> Key ID    4BFEBB31
> 

-- 
Joel Roth
  

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#208018

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Quoting Joel Roth (2019-05-01 20:48:05)
> mick crane wrote:
> > I've got a bunch of jpgs from the camera where the bits I want are a bit
> > underexposed. What I'd like is a GUI that will batch process them.
> ...
> > Any suggestions for available GUI that will batch process jpgs ?
> 
> Hi Mick,
> 
> I would suggest using the command line utility 'convert'
> that belongs to imagemagick. 

That's sort-of what Mick knew already and sought alternatives for (see 
the part of Mick's message that you snipped):

Graphics::Magick is a security-enhanced fork of ImageMagick: 
http://www.graphicsmagick.org/

:-)


 - Jonas

-- 
 * Jonas Smedegaard - idealist & Internet-arkitekt
 * Tlf.: +45 40843136  Website: http://dr.jones.dk/

 [x] quote me freely  [ ] ask before reusing  [ ] keep private

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#208019

mick crane wrote:
> I've got a bunch of jpgs from the camera where the bits I want are a bit 
> underexposed. What I'd like is a GUI that will batch process them.
> [....]
> Any suggestions for available GUI that will batch process jpgs ?

First, you could install gimp-plugin-registry. It adds, among others, DBP
a.k.a. 'David's Batch processor' to Gimp. Then in Gimp, under Filters >
Batch > Batch Process... > tab 'Colour', you can either check 'Auto Levels'
or adjust brightness, contrast and saturation manually.

Second, you could try aaphoto. It is a command-line program, but very
simple. It tries to make the picture look better by setting the optimal
contrast, gamma, color balance and saturation for it.

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#208027

On 2019-05-01 21:17, Siard wrote:
> mick crane wrote:
>> I've got a bunch of jpgs from the camera where the bits I want are a 
>> bit
>> underexposed. What I'd like is a GUI that will batch process them.
>> [....]
>> Any suggestions for available GUI that will batch process jpgs ?
> 
> First, you could install gimp-plugin-registry. It adds, among others, 
> DBP
> a.k.a. 'David's Batch processor' to Gimp. Then in Gimp, under Filters >
> Batch > Batch Process... > tab 'Colour', you can either check 'Auto 
> Levels'
> or adjust brightness, contrast and saturation manually.
> 
> Second, you could try aaphoto. It is a command-line program, but very
> simple. It tries to make the picture look better by setting the optimal
> contrast, gamma, color balance and saturation for it.

thanks for these

mick
-- 
Key ID    4BFEBB31

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