image converter and resizer

image converter and resizer

[Gottfried]

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Hi,
which package is useful and easy to use to convert and resize images in 
Guix?
I mean to reduce the size of the photo.

The programme : converseen (image converter and resizer) is not packed 
for Guix.
So I am looking for an other one.
-- 
Kind regards

Gottfried


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Re: image converter and resizer

[Felix Lechner via]

Hi Gottfried,

On Fri, Mar 17, 2023 at 9:44 AM Gottfried <gottfried@posteo.de> wrote:
>
> which package is useful and easy to use to convert and resize images in
> Guix?

The generic way to manipulate images in Linux (especially with
scripts) is probably imagemagick, but your time is probably better
spent learning GIMP, if you haven't. It's great!

Kind regards
Felix Lechner

Re: image converter and resizer

[Luis Felipe]

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Ah, Felix beat me to it :)

El 17/03/23 a las 16:55, Felix Lechner via escribió:
> Hi Gottfried,
>
> On Fri, Mar 17, 2023 at 9:44 AM Gottfried <gottfried@posteo.de> wrote:
>> which package is useful and easy to use to convert and resize images in
>> Guix?
> The generic way to manipulate images in Linux (especially with
> scripts) is probably imagemagick, but your time is probably better
> spent learning GIMP, if you haven't. It's great!
>
> Kind regards
> Felix Lechner
>

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Re: image converter and resizer

[Felix Lechner via]

Actually, Felipe knows a lot more about images in Guix. He designed
most of the artwork for Guix. All of it is exceptional!

It is Gottfried's privilege, dear Felipe, to receive your response;
and mine to have a modest piece of advice to be confirmed so quickly
by an expert!

Gottfried, meet Felipe!

Re: image converter and resizer

[Gottfried]

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Hi,

thanks for the answer

I heard gimp is a big programme,
and of course I can install it,
but I thought
I don’t need such a big programme
because to learn it takes a lot of time,
and I don’t want to spend much time for learning it now,
because I don’t need it for the moment.

I need only a small programme
to convert images to a smaller size. (image converter and resizer)

I installed converseen on an other laptop in Trisquel
and it works.
converseen can resize more images at once.

Imagemagick can only one image resize at once.

Can gimp resize more images at once?

Kind regards

Gottfried


Am 17.03.23 um 18:04 schrieb Luis Felipe:
> Ah, Felix beat me to it :)
> 
> El 17/03/23 a las 16:55, Felix Lechner via escribió:
>> Hi Gottfried,
>>
>> On Fri, Mar 17, 2023 at 9:44 AM Gottfried <gottfried@posteo.de> wrote:
>>> which package is useful and easy to use to convert and resize images in
>>> Guix?
>> The generic way to manipulate images in Linux (especially with
>> scripts) is probably imagemagick, but your time is probably better
>> spent learning GIMP, if you haven't. It's great!
>>
>> Kind regards
>> Felix Lechner
>>

-- 



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Re: image converter and resizer

[Luis Felipe]

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El 18/03/23 a las 11:13, Gottfried escribió:
> I need only a small programme
> to convert images to a smaller size. (image converter and resizer)
>
> I installed converseen on an other laptop in Trisquel
> and it works.
> converseen can resize more images at once.

Ah, I see now that converseen is a graphical program for batch 
processing of images. I'm not aware of any equivalent program in Guix.

>
> Imagemagick can only one image resize at once.

No, it does batch processing as well. I don't know what's your exact 
need, but there is an example of batch resizing in 
https://stackoverflow.com/questions/56305138/.

>
> Can gimp resize more images at once?
 From a quick search on the Web, it seems it can, but apparently not as 
straightforwardly as with converseen.

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Re: image converter and resizer

[Gottfried]

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Hi,

thanks very much for your help.

I prefer a graphical programme,
at the moment it is easier for me.

AFAIU imagemagick is a commandline programme.
In trisquel I can use imagemagick as a graphical programme.

In Guix there is no package: "imagemagick"

only: "perl-image-magick 6.89"

Is this the package in Guix for using imagemagick via commandline?

There is another package in Guix for the commandline:
"imgp"

but as I said, I prefer a graphical programme,
so may be "gimp" is the solution.

Kind regards

Gottfried


Am 18.03.23 um 16:28 schrieb Luis Felipe:
> El 18/03/23 a las 11:13, Gottfried escribió:
>> I need only a small programme
>> to convert images to a smaller size. (image converter and resizer)
>>
>> I installed converseen on an other laptop in Trisquel
>> and it works.
>> converseen can resize more images at once.
> 
> Ah, I see now that converseen is a graphical program for batch 
> processing of images. I'm not aware of any equivalent program in Guix.
> 
>>
>> Imagemagick can only one image resize at once.
> 
> No, it does batch processing as well. I don't know what's your exact 
> need, but there is an example of batch resizing in 
> https://stackoverflow.com/questions/56305138/.
> 
>>
>> Can gimp resize more images at once?
>  From a quick search on the Web, it seems it can, but apparently not as 
> straightforwardly as with converseen.

-- 

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Re: image converter and resizer

[Andreas Enge]

Hello,

Am Sat, Mar 18, 2023 at 04:43:45PM +0000 schrieb Gottfried:
> In Guix there is no package: "imagemagick"

yes there is!

guix build imagemagick
/gnu/store/gxggf8rsxd6l3rxi90d8qgsllzav1ycn-imagemagick-6.9.12-4-doc
/gnu/store/0b9yq69kk25si62rcaixx2c0ir6n5xvj-imagemagick-6.9.12-4

I had a quick look at converseen. It requires the qtlinguist package,
which we do not have in Guix.

Andreas

Re: image converter and resizer

[Nicolas Goaziou]

Hello,

Andreas Enge <andreas@enge.fr> writes:

> I had a quick look at converseen. It requires the qtlinguist package,
> which we do not have in Guix.

qtlinguist belongs to qttools, doesn't it?

The main issue in properly packaging converseen is, IMO, to remove the
(auto)update code all over the place.

For the record, here's a draft, without the check updates cleanup:

--8<---------------cut here---------------start------------->8---
(define-public converseen
  (package
    (name "converseen")
    (version "0.9.11.1")
    (source (origin
              (method git-fetch)
              (uri (git-reference
                    (url "https://github.com/Faster3ck/Converseen")
                    (commit (string-append "v" version))))
              (file-name (git-file-name name version))
              (sha256
               (base32
                "0nxvac8df47gxg1klqlz0s3rxl0ykrikmciniwkb938bgilmaijm"))))
    (build-system cmake-build-system)
    (arguments
     (list
      #:tests? #false                   ;no tests
      #:phases
      #~(modify-phases %standard-phases
          (add-after 'unpack 'set-translations-location
            ;; Fix translations location.
            (lambda _
              (substitute* "src/translator.cpp"
                (("QString\\(\"%1/share/converseen/loc\"\\).arg\\(rootPath\\)")
                 (string-append "QString(\""
                                #$output
                                "/share/converseen/loc\")")))))
          ;; (add-after 'unpack 'disable-updates-checks
          ;;   ;; Disable "Check for updates" since there's no use for it
          ;;   ;; in Guix and we don't want software to phone home.
          ;;   (lambda _
          ;;     (error "foo")))
          )))
    (native-inputs
     (list pkg-config qttools-5))
    (inputs
     (list imagemagick qtbase-5))
    (home-page "https://converseen.fasterland.net/")
    (synopsis "Batch image converter and resizer")
    (description
     "Converseen is an image batch conversion tool.  You can resize and
convert images in more than 100 different formats.")
    (license license:gpl3+)))
--8<---------------cut here---------------end--------------->8---

Regards,
-- 
Nicolas Goaziou

Re: image converter and resizer

[Gottfried]

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Hi,

thanks for your help.

converseen is a nice and easy to use programme,
in which you can  convert an image/picture/photo with some klicks.

And also many images at once.

You simply choose/load all the images, tick them,

and with one other tick you convert all of them at once
in choosing beforehand how much and to what kind you would like to 
convert them.

So if it doesn’t take too much time for somebody to build it for Guix
I would be happy.


Kind regards

Gottfried


Am 18.03.23 um 18:57 schrieb Nicolas Goaziou:
> Hello,
> 
> Andreas Enge <andreas@enge.fr> writes:
> 
>> I had a quick look at converseen. It requires the qtlinguist package,
>> which we do not have in Guix.
> 
> qtlinguist belongs to qttools, doesn't it?
> 
> The main issue in properly packaging converseen is, IMO, to remove the
> (auto)update code all over the place.
> 
> For the record, here's a draft, without the check updates cleanup:
> 
> --8<---------------cut here---------------start------------->8---
> (define-public converseen
>    (package
>      (name "converseen")
>      (version "0.9.11.1")
>      (source (origin
>                (method git-fetch)
>                (uri (git-reference
>                      (url "https://github.com/Faster3ck/Converseen")
>                      (commit (string-append "v" version))))
>                (file-name (git-file-name name version))
>                (sha256
>                 (base32
>                  "0nxvac8df47gxg1klqlz0s3rxl0ykrikmciniwkb938bgilmaijm"))))
>      (build-system cmake-build-system)
>      (arguments
>       (list
>        #:tests? #false                   ;no tests
>        #:phases
>        #~(modify-phases %standard-phases
>            (add-after 'unpack 'set-translations-location
>              ;; Fix translations location.
>              (lambda _
>                (substitute* "src/translator.cpp"
>                  (("QString\\(\"%1/share/converseen/loc\"\\).arg\\(rootPath\\)")
>                   (string-append "QString(\""
>                                  #$output
>                                  "/share/converseen/loc\")")))))
>            ;; (add-after 'unpack 'disable-updates-checks
>            ;;   ;; Disable "Check for updates" since there's no use for it
>            ;;   ;; in Guix and we don't want software to phone home.
>            ;;   (lambda _
>            ;;     (error "foo")))
>            )))
>      (native-inputs
>       (list pkg-config qttools-5))
>      (inputs
>       (list imagemagick qtbase-5))
>      (home-page "https://converseen.fasterland.net/")
>      (synopsis "Batch image converter and resizer")
>      (description
>       "Converseen is an image batch conversion tool.  You can resize and
> convert images in more than 100 different formats.")
>      (license license:gpl3+)))
> --8<---------------cut here---------------end--------------->8---
> 
> Regards,



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Re: image converter and resizer

[Csepp]

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Gottfried <gottfried@posteo.de> writes:

> [[PGP Signed Part:Undecided]]
> Hi,
>
> thanks for your help.
>
> converseen is a nice and easy to use programme,
> in which you can  convert an image/picture/photo with some klicks.
>
> And also many images at once.
>
> You simply choose/load all the images, tick them,
>
> and with one other tick you convert all of them at once
> in choosing beforehand how much and to what kind you would like to
> convert them.
>
> So if it doesn’t take too much time for somebody to build it for Guix
> I would be happy.

Not a proper upstreamable package yet, but you can build it locally in a
few minutes:

[-- Attachment #2: package definition --]
[-- Type: application/octet-stream, Size: 940 bytes --]

(use-modules
 (guix packages)
 (guix git-download)
 (guix build-system qt)
 (gnu packages imagemagick)
 (gnu packages qt)
 (gnu packages pkg-config))

(define-public converseen
  (package
    (name "converseen")
    (version "0.9.11.1")
    (source
     (origin
       (method git-fetch)
       (uri (git-reference
             (url "https://github.com/Faster3ck/Converseen")
             (commit (string-append "v" version))))
       (sha256
        (base32
         "0nxvac8df47gxg1klqlz0s3rxl0ykrikmciniwkb938bgilmaijm"))))
    (build-system qt-build-system)
    ;; doesn't seem to have tests
    (arguments '(#:tests? #f))
    (inputs (list
             imagemagick
             ;; TODO should this be a native input?
             qttools-5))
    (native-inputs (list pkg-config))
    (synopsis "Batch image converter and resizer")
    (home-page "https://converseen.fasterland.net/")
    (description #f)
    (license #f)))
converseen

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Save it as converseen.scm, install it with:
guix package --install-from-file=converseen.scm

Re: image converter and resizer

[Gottfried]

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Hi,
thank you very much.
I installed it, and it works
great

Kind regards

Gottfried


Am 21.03.23 um 14:47 schrieb Csepp:
> 
> Gottfried <gottfried@posteo.de> writes:
> 
>> [[PGP Signed Part:Undecided]]
>> Hi,
>>
>> thanks for your help.
>>
>> converseen is a nice and easy to use programme,
>> in which you can  convert an image/picture/photo with some klicks.
>>
>> And also many images at once.
>>
>> You simply choose/load all the images, tick them,
>>
>> and with one other tick you convert all of them at once
>> in choosing beforehand how much and to what kind you would like to
>> convert them.
>>
>> So if it doesn’t take too much time for somebody to build it for Guix
>> I would be happy.
> 
> Not a proper upstreamable package yet, but you can build it locally in a
> few minutes:
> 
> 
> 
> Save it as converseen.scm, install it with:
> guix package --install-from-file=converseen.scm

-- 

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Re: image converter and resizer

[Gottfried]

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Hi,

thank you very much for packing "converseen"

Now it is an "upstreamable package"

Kind regards

Gottfried



Am 21.03.23 um 14:47 schrieb Csepp:
> 
> Gottfried <gottfried@posteo.de> writes:
> 
>> [[PGP Signed Part:Undecided]]
>> Hi,
>>
>> thanks for your help.
>>
>> converseen is a nice and easy to use programme,
>> in which you can  convert an image/picture/photo with some klicks.
>>
>> And also many images at once.
>>
>> You simply choose/load all the images, tick them,
>>
>> and with one other tick you convert all of them at once
>> in choosing beforehand how much and to what kind you would like to
>> convert them.
>>
>> So if it doesn’t take too much time for somebody to build it for Guix
>> I would be happy.
> 
> Not a proper upstreamable package yet, but you can build it locally in a
> few minutes:
> 
> 
> 
> Save it as converseen.scm, install it with:
> guix package --install-from-file=converseen.scm

-- 



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Re: image converter and resizer

[Gottfried]

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Hi,

I was checking on the guix website among packages,
but the package imagemagick didn’t exist there.

So how did you know that it is there?

Or are there additional packages which are not mentioned there,
but you can build them?


Kind regards

Gottfried


Am 18.03.23 um 18:20 schrieb Andreas Enge:
> Hello,
> 
> Am Sat, Mar 18, 2023 at 04:43:45PM +0000 schrieb Gottfried:
>> In Guix there is no package: "imagemagick"
> 
> yes there is!
> 
> guix build imagemagick
> /gnu/store/gxggf8rsxd6l3rxi90d8qgsllzav1ycn-imagemagick-6.9.12-4-doc
> /gnu/store/0b9yq69kk25si62rcaixx2c0ir6n5xvj-imagemagick-6.9.12-4
> 
> I had a quick look at converseen. It requires the qtlinguist package,
> which we do not have in Guix.
> 
> Andreas
> 

-- 

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Re: image converter and resizer

[Csepp]

Gottfried <gottfried@posteo.de> writes:

> [[PGP Signed Part:Undecided]]
> Hi,
>
> I was checking on the guix website among packages,
> but the package imagemagick didn’t exist there.
>
> So how did you know that it is there?
>
> Or are there additional packages which are not mentioned there,
> but you can build them?

The package is definitely there.
https://packages.guix.gnu.org/search/?query=imagemagick

Did you maybe type the wrong name, maybe "magik" instead of "magick"?

Re: image converter and resizer

[Gottfried]

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Hi,
thanks for your help.

> Did you maybe type the wrong name, maybe "magik" instead of "magick"?

This could be, even I tried several times and checked the name.


I created a manifest with photoflare and imagemagick
and both packages were installed.

When I enter this profil
I can open photoflare,
but I can’t open imagemagick.
bash doesn’t find it.

I don’t know why.

I still installed:
julia-imagemagick
julia-imagemagick-jll

but still I can’t open it.


Kind regards

Gottfried



Am 21.03.23 um 14:18 schrieb Csepp:
> 
> Gottfried <gottfried@posteo.de> writes:
> 
>> [[PGP Signed Part:Undecided]]
>> Hi,
>>
>> I was checking on the guix website among packages,
>> but the package imagemagick didn’t exist there.
>>
>> So how did you know that it is there?
>>
>> Or are there additional packages which are not mentioned there,
>> but you can build them?
> 
> The package is definitely there.
> https://packages.guix.gnu.org/search/?query=imagemagick
> 
> Did you maybe type the wrong name, maybe "magik" instead of "magick"?

-- 


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Re: image converter and resizer

[Csepp]

Gottfried <gottfried@posteo.de> writes:

> [[PGP Signed Part:Undecided]]
> Hi,
> thanks for your help.
>
>> Did you maybe type the wrong name, maybe "magik" instead of "magick"?
>
> This could be, even I tried several times and checked the name.
>
>
> I created a manifest with photoflare and imagemagick
> and both packages were installed.
>
> When I enter this profil
> I can open photoflare,
> but I can’t open imagemagick.
> bash doesn’t find it.
>
> I don’t know why.
>
> I still installed:
> julia-imagemagick
> julia-imagemagick-jll
>
> but still I can’t open it.

Those are for the Julia language, they are not what you want installed.
Use the package named "imagemagick".

If it still doesn't show up, that might be a bug.  I've ran into some
weird behavior where packages are reported as installed but aren't
visible in the profile.  But so far it hasn't happened with guix shell
profiles.

Re: image converter and resizer

[Andreas Enge]

Am Tue, Mar 21, 2023 at 06:40:35PM +0100 schrieb Csepp:
> Use the package named "imagemagick".
> If it still doesn't show up, that might be a bug.

Watch out, it probably does not appear in the desktop environment,
and it contains lots of commands with different names. You can do
something like this:

$ guix build imagemagick
/gnu/store/gxggf8rsxd6l3rxi90d8qgsllzav1ycn-imagemagick-6.9.12-4-doc
/gnu/store/0b9yq69kk25si62rcaixx2c0ir6n5xvj-imagemagick-6.9.12-4
$ ls /gnu/store/0b9yq69kk25si62rcaixx2c0ir6n5xvj-imagemagick-6.9.12-4/bin
animate  composite  convert  identify  Magick++-config  MagickCore-config  mogrify  stream
compare  conjure    display  import    Magick-config    MagickWand-config  montage  Wand-config
to see the commands.

For instance,
   display xyz.jpg
typed on the command line shows the image, and so on. The user interface
(key bindings, mouse behaviour) is also a bit strange (this dates from
decades ago).

Andreas

Re: image converter and resizer

[Gottfried]

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Hi,

thanks very much,

imagemagick is working

when opening my profile, where I installed imagemagick

and I type
display xyz.jpg

than the image of imagemagick shows up

and with left and richt mouse clicks different menus show up

so it is possible to use it in a graphical way.

of course there are command line commands to use it,
I
but to learn that doesn’t make sense to me.
I can use it in a graphical way, will be quicker for me.

So thanks for helping me.

scrolling down the email are the commands for using imagemagick on the 
command line


kind regards

Gottfried


Am 21.03.23 um 19:43 schrieb Andreas Enge:
> Am Tue, Mar 21, 2023 at 06:40:35PM +0100 schrieb Csepp:
>> Use the package named "imagemagick".
>> If it still doesn't show up, that might be a bug.
> 
> Watch out, it probably does not appear in the desktop environment,
> and it contains lots of commands with different names. You can do
> something like this:
> 
> $ guix build imagemagick
> /gnu/store/gxggf8rsxd6l3rxi90d8qgsllzav1ycn-imagemagick-6.9.12-4-doc
> /gnu/store/0b9yq69kk25si62rcaixx2c0ir6n5xvj-imagemagick-6.9.12-4
> $ ls /gnu/store/0b9yq69kk25si62rcaixx2c0ir6n5xvj-imagemagick-6.9.12-4/bin
> animate  composite  convert  identify  Magick++-config  MagickCore-config  mogrify  stream
> compare  conjure    display  import    Magick-config    MagickWand-config  montage  Wand-config
> to see the commands.
> 
> For instance,
>     display xyz.jpg
> typed on the command line shows the image, and so on. The user interface
> (key bindings, mouse behaviour) is also a bit strange (this dates from
> decades ago).
> 
> Andreas
> 

here are the commands if somebody is interested in them:
by: "convert xyz.jpg" e.g. the commands show up:

gfp@Tuxedo ~ [env]$ convert xyz.jpg
Version: ImageMagick 6.9.12-4 Q16 x86_64 2021-03-20 https://imagemagick.org
Copyright: (C) 1999-2021 ImageMagick Studio LLC
License: https://imagemagick.org/script/license.php
Features: Cipher DPC OpenMP(4.5)
Delegates (built-in): bzlib fftw fontconfig freetype gvc jng jpeg lcms 
lzma pangocairo png tiff x xml zlib
Usage: convert [options ...] file [ [options ...] file ...] [options 
...] file

Image Settings:
   -adjoin              join images into a single multi-image file
   -affine matrix       affine transform matrix
   -alpha option        activate, deactivate, reset, or set the alpha 
channel
   -antialias           remove pixel-aliasing
   -authenticate password
                        decipher image with this password
   -attenuate value     lessen (or intensify) when adding noise to an image
   -background color    background color
   -bias value          add bias when convolving an image
   -black-point-compensation
                        use black point compensation
   -blue-primary point  chromaticity blue primary point
   -bordercolor color   border color
   -caption string      assign a caption to an image
   -channel type        apply option to select image channels
   -clip-mask filename  associate a clip mask with the image
   -colors value        preferred number of colors in the image
   -colorspace type     alternate image colorspace
   -comment string      annotate image with comment
   -compose operator    set image composite operator
   -compress type       type of pixel compression when writing the image
   -define format:option
                        define one or more image format options
   -delay value         display the next image after pausing
   -density geometry    horizontal and vertical density of the image
   -depth value         image depth
   -direction type      render text right-to-left or left-to-right
   -display server      get image or font from this X server
   -dispose method      layer disposal method
   -dither method       apply error diffusion to image
   -encoding type       text encoding type
   -endian type         endianness (MSB or LSB) of the image
   -family name         render text with this font family
   -fill color          color to use when filling a graphic primitive
   -filter type         use this filter when resizing an image
   -font name           render text with this font
   -format "string"     output formatted image characteristics
   -fuzz distance       colors within this distance are considered equal
   -gravity type        horizontal and vertical text placement
   -green-primary point chromaticity green primary point
   -intensity method    method to generate intensity value from pixel
   -intent type         type of rendering intent when managing the image 
color
   -interlace type      type of image interlacing scheme
   -interline-spacing value
                        set the space between two text lines
   -interpolate method  pixel color interpolation method
   -interword-spacing value
                        set the space between two words
   -kerning value       set the space between two letters
   -label string        assign a label to an image
   -limit type value    pixel cache resource limit
   -loop iterations     add Netscape loop extension to your GIF animation
   -mask filename       associate a mask with the image
   -matte               store matte channel if the image has one
   -mattecolor color    frame color
   -moments             report image moments
   -monitor             monitor progress
   -orient type         image orientation
   -page geometry       size and location of an image canvas (setting)
   -ping                efficiently determine image attributes
   -pointsize value     font point size
   -precision value     maximum number of significant digits to print
   -preview type        image preview type
   -quality value       JPEG/MIFF/PNG compression level
   -quiet               suppress all warning messages
   -red-primary point   chromaticity red primary point
   -regard-warnings     pay attention to warning messages
   -remap filename      transform image colors to match this set of colors
   -repage geometry     size and location of an image canvas
   -respect-parentheses settings remain in effect until parenthesis boundary
   -sampling-factor geometry
                        horizontal and vertical sampling factor
   -scene value         image scene number
   -seed value          seed a new sequence of pseudo-random numbers
   -size geometry       width and height of image
   -stretch type        render text with this font stretch
   -stroke color        graphic primitive stroke color
   -strokewidth value   graphic primitive stroke width
   -style type          render text with this font style
   -support factor      resize support: > 1.0 is blurry, < 1.0 is sharp
   -synchronize         synchronize image to storage device
   -taint               declare the image as modified
   -texture filename    name of texture to tile onto the image background
   -tile-offset geometry
                        tile offset
   -treedepth value     color tree depth
   -transparent-color color
                        transparent color
   -undercolor color    annotation bounding box color
   -units type          the units of image resolution
   -verbose             print detailed information about the image
   -view                FlashPix viewing transforms
   -virtual-pixel method
                        virtual pixel access method
   -weight type         render text with this font weight
   -white-point point   chromaticity white point

Image Operators:
   -adaptive-blur geometry
                        adaptively blur pixels; decrease effect near edges
   -adaptive-resize geometry
                        adaptively resize image using 'mesh' interpolation
   -adaptive-sharpen geometry
                        adaptively sharpen pixels; increase effect near 
edges
   -alpha option        on, activate, off, deactivate, set, opaque, copy
                        transparent, extract, background, or shape
   -annotate geometry text
                        annotate the image with text
   -auto-gamma          automagically adjust gamma level of image
   -auto-level          automagically adjust color levels of image
   -auto-orient         automagically orient (rotate) image
   -bench iterations    measure performance
   -black-threshold value
                        force all pixels below the threshold into black
   -blue-shift factor   simulate a scene at nighttime in the moonlight
   -blur geometry       reduce image noise and reduce detail levels
   -border geometry     surround image with a border of color
   -bordercolor color   border color
   -brightness-contrast geometry
                        improve brightness / contrast of the image
   -canny geometry      detect edges in the image
   -cdl filename        color correct with a color decision list
   -charcoal radius     simulate a charcoal drawing
   -chop geometry       remove pixels from the image interior
   -clamp               keep pixel values in range (0-QuantumRange)
   -clip                clip along the first path from the 8BIM profile
   -clip-path id        clip along a named path from the 8BIM profile
   -colorize value      colorize the image with the fill color
   -color-matrix matrix apply color correction to the image
   -connected-components connectivity
                        connected-components uniquely labeled
   -contrast            enhance or reduce the image contrast
   -contrast-stretch geometry
                        improve contrast by `stretching' the intensity range
   -convolve coefficients
                        apply a convolution kernel to the image
   -cycle amount        cycle the image colormap
   -decipher filename   convert cipher pixels to plain pixels
   -deskew threshold    straighten an image
   -despeckle           reduce the speckles within an image
   -distort method args
                        distort images according to given method ad args
   -draw string         annotate the image with a graphic primitive
   -edge radius         apply a filter to detect edges in the image
   -encipher filename   convert plain pixels to cipher pixels
   -emboss radius       emboss an image
   -enhance             apply a digital filter to enhance a noisy image
   -equalize            perform histogram equalization to an image
   -evaluate operator value
                        evaluate an arithmetic, relational, or logical 
expression
   -extent geometry     set the image size
   -extract geometry    extract area from image
   -features distance   analyze image features (e.g. contrast, correlation)
   -fft                 implements the discrete Fourier transform (DFT)
   -flip                flip image vertically
   -floodfill geometry color
                        floodfill the image with color
   -flop                flop image horizontally
   -frame geometry      surround image with an ornamental border
   -function name parameters
                        apply function over image values
   -gamma value         level of gamma correction
   -gaussian-blur geometry
                        reduce image noise and reduce detail levels
   -geometry geometry   preferred size or location of the image
   -grayscale method    convert image to grayscale
   -hough-lines geometry
                        identify lines in the image
   -identify            identify the format and characteristics of the image
   -ift                 implements the inverse discrete Fourier 
transform (DFT)
   -implode amount      implode image pixels about the center
   -interpolative-resize geometry
                        resize image using 'point sampled' interpolation
   -kuwahara geometry   edge preserving noise reduction filter
   -lat geometry        local adaptive thresholding
   -level value         adjust the level of image contrast
   -level-colors color,color
                        level image with the given colors
   -linear-stretch geometry
                        improve contrast by `stretching with saturation'
   -liquid-rescale geometry
                        rescale image with seam-carving
   -local-contrast geometry
                        enhance local contrast
   -magnify             double the size of the image with pixel art scaling
   -mean-shift geometry delineate arbitrarily shaped clusters in the image
   -median geometry     apply a median filter to the image
   -mode geometry       make each pixel the 'predominant color' of the
                        neighborhood
   -modulate value      vary the brightness, saturation, and hue
   -monochrome          transform image to black and white
   -morphology method kernel
                        apply a morphology method to the image
   -motion-blur geometry
                        simulate motion blur
   -negate              replace every pixel with its complementary color
   -noise geometry      add or reduce noise in an image
   -normalize           transform image to span the full range of colors
   -opaque color        change this color to the fill color
   -ordered-dither NxN
                        add a noise pattern to the image with specific
                        amplitudes
   -paint radius        simulate an oil painting
   -perceptible epsilon
                        pixel value less than |epsilon| become epsilon or
                        -epsilon
   -polaroid angle      simulate a Polaroid picture
   -posterize levels    reduce the image to a limited number of color levels
   -profile filename    add, delete, or apply an image profile
   -quantize colorspace reduce colors in this colorspace
   -radial-blur angle   radial blur the image (deprecated use 
-rotational-blur
   -raise value         lighten/darken image edges to create a 3-D effect
   -random-threshold low,high
                        random threshold the image
   -region geometry     apply options to a portion of the image
   -render              render vector graphics
   -resample geometry   change the resolution of an image
   -resize geometry     resize the image
   -roll geometry       roll an image vertically or horizontally
   -rotate degrees      apply Paeth rotation to the image
   -rotational-blur angle
                        rotational blur the image
   -sample geometry     scale image with pixel sampling
   -scale geometry      scale the image
   -segment values      segment an image
   -selective-blur geometry
                        selectively blur pixels within a contrast threshold
   -sepia-tone threshold
                        simulate a sepia-toned photo
   -set property value  set an image property
   -shade degrees       shade the image using a distant light source
   -shadow geometry     simulate an image shadow
   -sharpen geometry    sharpen the image
   -shave geometry      shave pixels from the image edges
   -shear geometry      slide one edge of the image along the X or Y axis
   -sigmoidal-contrast geometry
                        increase the contrast without saturating 
highlights or
                        shadows
   -sketch geometry     simulate a pencil sketch
   -solarize threshold  negate all pixels above the threshold level
   -sparse-color method args
                        fill in a image based on a few color points
   -splice geometry     splice the background color into the image
   -spread radius       displace image pixels by a random amount
   -statistic type geometry
                        replace each pixel with corresponding statistic 
from the
                        neighborhood
   -strip               strip image of all profiles and comments
   -swirl degrees       swirl image pixels about the center
   -threshold value     threshold the image
   -thumbnail geometry  create a thumbnail of the image
   -tile filename       tile image when filling a graphic primitive
   -tint value          tint the image with the fill color
   -transform           affine transform image
   -transparent color   make this color transparent within the image
   -transpose           flip image vertically and rotate 90 degrees
   -transverse          flop image horizontally and rotate 270 degrees
   -trim                trim image edges
   -type type           image type
   -unique-colors       discard all but one of any pixel color
   -unsharp geometry    sharpen the image
   -vignette geometry   soften the edges of the image in vignette style
   -wave geometry       alter an image along a sine wave
   -wavelet-denoise threshold
                        removes noise from the image using a wavelet 
transform
   -white-threshold value
                        force all pixels above the threshold into white

Image Sequence Operators:
   -append              append an image sequence
   -clut                apply a color lookup table to the image
   -coalesce            merge a sequence of images
   -combine             combine a sequence of images
   -compare             mathematically and visually annotate the 
difference between an image and its reconstruction
   -complex operator    perform complex mathematics on an image sequence
   -composite           composite image
   -copy geometry offset
                        copy pixels from one area of an image to another
   -crop geometry       cut out a rectangular region of the image
   -deconstruct         break down an image sequence into constituent parts
   -evaluate-sequence operator
                        evaluate an arithmetic, relational, or logical 
expression
   -flatten             flatten a sequence of images
   -fx expression       apply mathematical expression to an image channel(s)
   -hald-clut           apply a Hald color lookup table to the image
   -layers method       optimize, merge, or compare image layers
   -morph value         morph an image sequence
   -mosaic              create a mosaic from an image sequence
   -poly terms          build a polynomial from the image sequence and 
the corresponding
                        terms (coefficients and degree pairs).
   -print string        interpret string and print to console
   -process arguments   process the image with a custom image filter
   -separate            separate an image channel into a grayscale image
   -smush geometry      smush an image sequence together
   -write filename      write images to this file

Image Stack Operators:
   -clone indexes       clone an image
   -delete indexes      delete the image from the image sequence
   -duplicate count,indexes
                        duplicate an image one or more times
   -insert index        insert last image into the image sequence
   -reverse             reverse image sequence
   -swap indexes        swap two images in the image sequence

Miscellaneous Options:
   -debug events        display copious debugging information
   -distribute-cache port
                        distributed pixel cache spanning one or more servers
   -help                print program options
   -list type           print a list of supported option arguments
   -log format          format of debugging information
   -version             print version information

By default, the image format of `file' is determined by its magic
number.  To specify a particular image format, precede the filename
with an image format name and a colon (i.e. ps:image) or specify the
image type as the filename suffix (i.e. image.ps).  Specify 'file' as
'-' for standard input or output.




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Re: image converter and resizer

[Gottfried]

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Hi,

thanks for your help

may be imagemagick can be used only in the command line
but I hoped to be graphical, as I know it from Trisquel.

Or can it be that I have first to do a:
sudo guix system reconfigure /etc/config.scm
before it works properly.
But photoflare is working graphically,
without doing a sudo guix system reconfigure /etc/config.scm


How is it generally:

If I create a new profile, it should work
or do I have to do than a
sudo guix system reconfigure /etc/config.scm
so that everything is in place and it works properly?

kind regards

Gottfried

Am 21.03.23 um 18:40 schrieb Csepp:
> 
> Gottfried <gottfried@posteo.de> writes:
> 
>> [[PGP Signed Part:Undecided]]
>> Hi,
>> thanks for your help.
>>
>>> Did you maybe type the wrong name, maybe "magik" instead of "magick"?
>>
>> This could be, even I tried several times and checked the name.
>>
>>
>> I created a manifest with photoflare and imagemagick
>> and both packages were installed.
>>
>> When I enter this profil
>> I can open photoflare,
>> but I can’t open imagemagick.
>> bash doesn’t find it.
>>
>> I don’t know why.
>>
>> I still installed:
>> julia-imagemagick
>> julia-imagemagick-jll
>>
>> but still I can’t open it.
> 
> Those are for the Julia language, they are not what you want installed.
> Use the package named "imagemagick".
> 
> If it still doesn't show up, that might be a bug.  I've ran into some
> weird behavior where packages are reported as installed but aren't
> visible in the profile.  But so far it hasn't happened with guix shell
> profiles.
> 

-- 



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Re: image converter and resizer

[Luis Felipe]

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El 18/03/23 a las 16:43, Gottfried escribió:
> I prefer a graphical programme,
> at the moment it is easier for me.

Gottfried, I think the program called photoflare might be close to what 
you want. Try the following:

 1. guix install photoflare
 2. Start the program
 3. In the main menu, go to Tools → Automate/Batch...

You will see a new window opens where you can select all the files you 
want to transform, the transformations you'd like to apply, the folder 
where you want to save the results, and so on.

Using the GIMP graphically for the same purpose seems to require a 
plugin that is not in Guix 
(https://github.com/alessandrofrancesconi/gimp-plugin-bimp/).

Hope that helps.


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Re: image converter and resizer

[Luis Felipe]

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El 17/03/23 a las 16:43, Gottfried escribió:
> Hi,
> which package is useful and easy to use to convert and resize images 
> in Guix?
> I mean to reduce the size of the photo.

Hi, Gottfried.

You can use imagemagick or GIMP. You can find examples of resizing in 
the following links:

  * https://imagemagick.org/Usage/resize/
  * https://www.gimp.org/tutorials/GIMP_Quickies/

They can also convert between formats and many more things.

Hope that helps,

-- 
Luis Felipe López Acevedo
https://luis-felipe.gitlab.io/


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