Batch magnify from a folder to an another one [solved]

[kimono]

Hi, I'm totally new here. I use ImageMagick-7.0.8-Q16 on Windows 10.
I wish to use the -magnify command (scale2x filter) to .png files toward an another folder in .png format.

I've got simply two questions:
- Can someone tell me what is the correct command line to do this?
- Can you explain what -minify command exactly does on an image?

Thank you for your help!

[fmw42]

Change directories to the folder where you have your input. Be sure you already have an output directory.

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magick.exe image.png -magnify paphto_output_directory\image.png

There is no minify function according to the commands list at https://imagemagick.org/script/command-line-options.php

If you want a general enlarging or shrinking image command, then use -resize.

[kimono]

@fmw42: Thanks for your answer. I've got a folder with around 100 png images and I wish to magnify all of them in one time to another directory.
How can I do that?
Is -resize (= nearest neighbor? )the best way to shrink an image without having a blurred pixelart?

[fmw42]

1) use mogrify -- it will process all images in a folder and write to a new folder

create a new folder
change directories to the current folder
magic.exe mogrify -path path_to_new_folder -magnify *.png

See https://imagemagick.org/Usage/basics/#mogrify

2) you resize smaller using nearest neighbor as -filter nearestneighbor -resize ...

or

use -sample

see

https://imagemagick.org/script/command- ... php#resize
https://imagemagick.org/script/command- ... php#sample


________________

If using Imagemagick 7, then see http://imagemagick.org/script/porting.php#cli


For novices, see

http://www.imagemagick.org/discourse-se ... f=1&t=9620
http://www.imagemagick.org/script/comma ... essing.php
http://www.imagemagick.org/Usage/reference.html
http://www.imagemagick.org/Usage/
https://github.com/ImageMagick/usage-markdown
https://imagemagick.org/script/porting.php#cli

[kimono]

Ok I tested this:

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C:\ImageMagick-7.0.8-Q16>magick.exe mogrify -path Karatedo -magnify *.png
mogrify: UnrecognizedOption `-magnify' @ error/mogrify.c/MogrifyImageCommand/5557.

It seems that the magnify option is not recognized.
Can you tell me what I've done wrong? Thank you

[snibgo]

"-magnify" isn't an option for "magick mogrify".

[fmw42]

You can request that it be added on the Discourse server. In the meantime you will have to write a loop over all the images you want to process or the images in a folder and use convert or magick to process them depending upon what your IM version is - 6 or 7.

[kimono]

@snibgo: Thanks for the information, I'll search where I can post this request.

@fmw42: I use the latest version of IM-7 and I don't know how to write a loop :/. Can you show me please the global writing?

[fmw42]

Sorry, I do not use Windows. I can show you in Unix, but then you would need to use Windows 10 Unix. Perhaps one of the Windows users here can help you further or do a Google search for .bat scripting.

[kimono]

I retested with an updated version (ImageMagick-7.0.8-38-Q16-x64-dll) and I've got the following message:
"Le client ne dispose pas d'un privilège nécessaire"
"Client does not have a necessary privilege"
I reboot windows 10 and authorized to have a total control with all the files of the Imagemagick folder and the input folder but it doesn't seem to work.
Do you have any clue on how to solve it?

[snibgo]

I don't think that message came from ImageMagick.

What were your commands? Which command produced that message?

[kimono]

I came from that command line:

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C:\ImageMagick-7.0.8-Q16>magick.exe mogrify -path Karatedo -magnify *.png

Is it because I don't have an output folder? Do you know how I cad add an output to this command line?

[snibgo]

C:\ImageMagick-7.0.8-Q16>magick.exe

You are in the ImageMagick installation directory, and running the command from there. This is a bad idea. I suggest you create a different directory for your image processing, and change to that directory.

Ensure that "C:\ImageMagick-7.0.8-Q16" is on your system path.

You are writing to the output directory "Karatedo". If that directory does not exist, the command will fail.

[kimono]

@snibgo: I think I had got a problem of read only with some files in win10. I run a window command as administrator and I've got the following message:

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Access Denied.

So the correct command could be:

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C:\[Inputfolder]>magick.exe mogrify -path [outputfolder] -magnify *.png

?

[fmw42]

The output directory must be created ahead of time. Mogrify will not create one.

create a new directory Karatedo
change directory to your directory containing the images. Do not work in the ImageMagick directory as snibgo said.

Code: Select all

magick.exe mogrify -path path_to_existing/Karatedo -magnify *.png