Comments on: imagemagick: command line photoshop, only so much better

By: Tmbigrigg

Tmbigrigg — Tue, 03 Jun 2008 20:55:44 +0000

I want to use ImageMagick to convert a series of photos to Sepia and black and white.
OK so I can use dcraw to convert the NEF (RAW) files to .JPG. and I can use the following command to

convert to Sepia-Tone and black and white:
[I]convert filename.JPG -sepia-tone 75% filename.sepia-tone.JPG[/I]
[I]convert filename.JPG -colorspace Gray filename.bw.JPG[/I]

How can I use these commands in a script that will act on multiple filenames within a directory and/or

directory tree. The following is an example of the directory structure that I want to work with. I would

also ideally like to save the Sepia and Black and White JPGs in their own folders within the parent

directory. The final result would be something where 2008-05-07, 2008-05-09 and 2008-05-15 would end up

with additional directories for Sepia and BW created and the sepia and BW files moved into those directories.

[B]2008-05-07[/B]
DSC_1000.JPG
DSC_1001.JPG
DSC_1002.JPG
DSC_1003.JPG
[B]2008-05-09[/B]
DSC_1004.JPG
DSC_1005.JPG
DSC_1006.JPG
[B]2008-05-15[/B]
DSC_1007.JPG
DSC_1009.JPG
DSC_1025.JPG

By: ahmadinejad

ahmadinejad — Sun, 02 Dec 2007 07:18:46 +0000

Bash rules…. Command Line interface is greattt.. Many things could have done in seconds. Nice tips..

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By: James

James — Wed, 31 Oct 2007 17:11:46 +0000

I also love imagemagick. Some things I’ve found useful:

convert -geometry 640×640!

The ‘!’ will force the exact resolution. Convert will try and keep your aspect ratio intact if you simply supplied 640×480.

mogrify will change the image in-place.

mogrify -resize 640x

identify will give you useful information about the image (such as its type and resolution) right on the command line:

$ identify t2.png
t2.png PNG 128×128 128×128+0+0 DirectClass 16-bit 7.83984kb

By: Fintan

Fintan — Wed, 31 Oct 2007 10:19:02 +0000

Brilliant tutorial, I had wondered how people take screen shots of linux installations and it turned out use VMware.. Why didn’t think of this .

Thanks for sharing command line tip of resizing pictures.

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