Hide

What's this?

commandlinefu.com is the place to record those command-line gems that you return to again and again.

Delete that bloated snippets file you've been using and share your personal repository with the world. That way others can gain from your CLI wisdom and you from theirs too. All commands can be commented on, discussed and voted up or down.

If you have a new feature suggestion or find a bug, please get in touch via http://commandlinefu.uservoice.com/

Get involved!

You can sign-in using OpenID credentials, or register a traditional username and password.

OpenID

First-time OpenID users will be automatically assigned a username which can be changed after signing in.

Hide

Stay in the loop…

Follow the Tweets.

Every new command is wrapped in a tweet and posted to Twitter. Following the stream is a great way of staying abreast of the latest commands. For the more discerning, there are Twitter accounts for commands that get a minimum of 3 and 10 votes - that way only the great commands get tweeted.

» http://twitter.com/commandlinefu
» http://twitter.com/commandlinefu3
» http://twitter.com/commandlinefu10

Subscribe to the feeds.

Use your favourite RSS aggregator to stay in touch with the latest commands. There are feeds mirroring the 3 Twitter streams as well as for virtually every other subset (users, tags, functions,…):

Subscribe to the feed for:

» all commands
» commands with 3 up-votes (commandlinefu3)
» commands with 10 up-votes (commandlinefu10)
» commands tagged imagemagick

Hide

News

2012-05-20 - test: test
2012-05-20 - test: test
2012-05-20 - test: test
2012-05-20 - Test tweets: YU not working?

Hide

Functions

Hide

Credits

Site by David Winterbottom (user root).

Commands tagged ImageMagick

Terminal - Commands tagged ImageMagick - 48 results

convert image1 image2 -resize '400x300!' MIFF:- | compare -metric AE -fuzz '10%' - null:

2012-04-17 11:25:34

User: dooblem

Tags: ImageMagick diff compare convert images

Up
Down

Compare / diff two images

Outputs the number of different pixels.

2 params to increase tolerance:

* thumbnails size

* fuzz, the color distance tolerance

See http://en.positon.org/post/Compare-/-diff-between-two-images for more details.

Comments (0) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate

identify -format "%[fx:w]x%[fx:h]" logo:

2012-02-19 08:29:56

User: dratini0

Tags: ImageMagick resolution image identify

Up
Down

Resolution of a image

You can use the -format switch to get the size of the image. Replace "logo:" with your image.

identify image.jpg |grep -o "[[:digit:]]*x[[:digit:]]*" |tail -1

2012-02-19 06:49:38

User: totti

Functions: grep tail

Tags: ImageMagick resolution image

Up
Down

Resolution of a image

Comments (1) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate

mogrify -colorspace Gray -rotate '-90>' -resize 600x800 -dither FloydSteinberg -colors 16 -format png *

2012-02-01 17:16:52

User: yoyoyojomo

Tags: ImageMagick kindle

Up
Down

Format images for Kindle

optipng *.png

http://www.mobileread.com/forums/showpost.php?p=147076&postcount=7

-dither FloydSteinberg produces a more uniform dither than the default.

Comments (0) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate

for fn in xkcd*.png xkcd*.jpg; do echo $fn; read xw xh <<<$(identify -format '%w %h' $fn); nn="$(echo $fn | sed 's/xkcd-$[^-]\+$-.*/\1/')"; wget -q -O xkcd-${nn}.json http://xkcd.com/$nn/info.0.json; tt="$(sed 's/.*"title": "$[^"]\+$",.*/\1/' ...

2012-01-06 20:26:11

User: fpunktk

Functions: echo read wget

Tags: bash ImageMagick sed identify convert xkcd

-2

Up
Down

add title and alt-text to your collection of xkcd comics

full command:

for fn in xkcd*.png xkcd*.jpg; do; echo $fn; read xw xh <<<$(identify -format '%w %h' $fn); nn="$(echo $fn | sed 's/xkcd-\([0-9]\+\)-.*/\1/')"; wget -q -O xkcd-${nn}.json http://xkcd.com/$nn/info.0.json; tt="$(sed 's/.*"title": "\([^"]*\)", .*/\1/' xkcd-${nn}.json)"; at="$(sed 's/.*alt": "\(.*\)", .*/\1/' xkcd-${nn}.json)"; convert -background white -fill black -font /usr/share/fonts/truetype/freefont/FreeSansBold.ttf -pointsize 26 -size ${xw}x -gravity Center caption:"$tt" tt.png; convert -background '#FFF9BD' -border 1x1 -bordercolor black -fill black -font /usr/share/fonts/truetype/freefont/FreeSans.ttf -pointsize 16 -size $(($xw - 2))x -gravity Center caption:"$at" at.png; th=$(identify -format '%h' tt.png); ah=$(identify -format '%h' at.png); convert -size ${xw}x$(($xh+$th+$ah+5)) "xc:white" tt.png -geometry +0+0 -composite $fn -geometry +0+$th -composite at.png -geometry +0+$(($th+$xh+5)) -composite ${fn%\.*}_cmp.png; echo -e "$fn $nn $xw $xh $th $ah \n$tt \n$at\n"; done

this assumes that all comics are saved as xkcd-[number]-[title].{png|jpg}.

it will then download the title and alt-text, create pictures from them, and put everything together in a new png-file.

it's not perfect, but it worked for nearly all my comics.

it uses the xkcd-json-interface.

though it's poorly written, it doesn't completely break on http://xkcd.com/859/

Comments (0) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate

awk 'BEGIN{FS=":"; print "digraph{"}{split($4, a, ","); for (i in a) printf "\"%s\" [shape=box]\n\"%s\" -> \"%s\"\n", $1, a[i], $1}END{print "}"}' /etc/group|display

2011-12-04 01:56:44

User: point_to_null

Functions: awk printf

Tags: ImageMagick awk dot

Up
Down

Print diagram of user/groups

Parses /etc/group to "dot" format and pases it to "display" (imagemagick) to show a usefull diagram of users and groups (don't show empty groups).

Comments (1) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate

lsmod | awk 'BEGIN{print "digraph{"}{split($4, a, ","); for (i in a) print $1, "->", a[i]}END{print "}"}'|display

2011-12-04 01:41:23

User: point_to_null

Functions: awk lsmod

Tags: ImageMagick awk lsmod dot

Up
Down

Draw kernel module dependancy graph.

parse "lsmod" output to "dot" format and pass it to "display". Without perl!

Comments (2) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate

read -s PASS; echo $PASS | convert sensitive.jpg -encipher - -depth 8 png24:hidden.png

2011-11-25 18:15:23

User: kev

Functions: echo read

Tags: ImageMagick

Up
Down

encrypt sensitive image using password

Do not use JPEG, GIF, or any other 'lossy' image encoding with Encryption

Comments (5) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate

convert -resize '1024x600^' image.jpg small-image.jpg

2011-10-14 22:34:14

User: aguslr

Tags: ImageMagick

Up
Down

Resize an image to at least a specific resolution

This command will resize an image (keeping the aspect ratio) to a specific resolution, meaning the resulting image will never be smaller than this resolution.

For example, if we have a 2048x1000 image, the output would be 1229x600, not 1024x600 or 1024x500. Same thing for the height, if the image is 2000x1200, the output would be 1024x614.

Comments (1) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate

find . -type f -name '*.jpg' -exec convert -quality 75 {} {} \;

2011-09-23 13:51:18

User: bobby_tables

Functions: find

Tags: ImageMagick find jpeg jpg

Up
Down

Converts all jpg files to 75 quality.

Requires ImageMagick to be installed.

This command was stolen from @climagic on Twitter.

Probably a duplicate of command below, but this command uses slightly higher quality.

http://www.commandlinefu.com/commands/view/707/compress-images-using-convert-imagemagick-in-a-bulk

Comments (0) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate

mogrify -resize 600x800! *.jpg

2011-09-09 18:19:59

User: totti

Tags: ImageMagick image batch resize

Up
Down

Batch resize image to exact given resolution ignoring aspect ratio

- Backup data before reszie as it over write original

-To preserve aspect ratio remove !

Comments (0) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate

convert -background none -pointsize 55 label:"`whoami`" me.png

2011-09-07 17:06:38

User: totti

Tags: ImageMagick image convert

Up
Down

Text to image with transparent background

Create transparent image to use as icon, watermark for other images, etc.

Comments (0) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate

composite -geometry 96x96+250+70 foreground.jpg background.jpg image.jpg

2011-09-04 16:55:51

User: carlosj2585

Tags: ImageMagick images composite

Up
Down

Compose 2 images to 1

Compose 2 images (foreground.jpg with background.jpg) into 1 (image.jpg), the numeric parameters stablish the size of the foreground.jpg image (96x96) and the position x,y (+250+70) relative to the background.jpg image.

Images can be any format, jpg, png, bmp, etc...

Comments (0) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate

convert input.png -pointsize 32 -gravity center -annotate 45 "hello, world" output.png

2011-08-26 06:49:25

User: kev

Tags: ImageMagick

-1

Up
Down

draw 45deg rotated text at the center of image

Comments (1) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate

convert input.png -alpha set -channel A -fx 0.5 output.png

2011-08-25 16:12:38

User: kev

Functions: set

Tags: ImageMagick

Up
Down

make image semi-transparent

Comments (0) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate

convert -size 20x20 xc:white -fill black -draw "circle 10,10 14,14" miff:- | composite -tile - input.png -compose over miff:- | composite - input.png -compose copyopacity output.png

2011-08-24 16:30:34

User: kev

Tags: ImageMagick

Up
Down

drill holes on image

Comments (0) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate

ifconfig | convert label:@- ip.png

2011-08-24 05:58:29

User: kev

Functions: ifconfig

Tags: ImageMagick

Up
Down

save command output to image

composite -dissolve 30% -tile watermark.png input.png output.png

2011-08-24 03:42:40

User: kev

Tags: ImageMagick

Up
Down

add repeated watermark to image

Comments (0) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate

convert input.png -colorspace Gray output.png

2011-08-24 01:02:34

User: kev

Tags: ImageMagick

Up
Down

grayscale image

Comments (0) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate

convert -size 32x32 $ xc:red xc:green +append $ $ xc:yellow xc:blue +append $ -append output.png

2011-08-23 07:44:07

User: kev

Tags: ImageMagick

Up
Down

create a colorful 田 image

Comments (0) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate

montage *.png -mode concatenate -tile 10x all.png

2011-08-23 07:32:29

User: kev

Tags: ImageMagick

Up
Down

create a image matrix

Comments (0) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate

convert input.png -shave 10x10 output.png

2011-08-23 07:30:16

User: kev

Tags: ImageMagick

Up
Down

remove border of image

Comments (0) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate

convert input.png -mattecolor gold -frame 10x10+5+5 output.png

2011-08-23 07:29:22

User: kev

Tags: ImageMagick

Up
Down

add border to image

Comments (0) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate

convert -crop 32x33 +repage http://code.google.com/more/more-sprite.png icon.png

2011-08-23 07:15:42

User: kev

Tags: ImageMagick

Up
Down

crop google's icons

convert -crop 51x34 +repage http://www.google.com/images/flags/sprite_flag-50.png flag.png

Comments (0) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate

c=blue;convert -size 50x50 xc:$c $c.png; for i in red green yellow; do convert $c.png -background $i -rotate 20 $i.png; rm $c".png"; c=$i; done; mv $i".png" logo.png; display logo.png

2011-08-21 15:59:11

User: Funatiker

Functions: mv rm

Tags: ImageMagick

Up
Down

create a colorful image

Deletes unneeded files after every step and allows to use a color other than yellow at the last position.

Comments (0) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate

1 2 >