ImageMagick is an open source image editing software suite for displaying, converting, and editing raster image files. It supports read/write for more than 100 image file formats.

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1answer
889 views

Imagemagick on open wrt router “UnableToOpenConfigureFile”

I have installed Open Wrt on my TP-Link TL-WR740N/ND v4. Everything works fine but the Imagemagick. I have installed it into ram (no enough space on rom ) with opkg # opkg install imagemagick ...
7
votes
4answers
8k views

How to convert a color pdf to black-white?

I'd like to transform a pdf with some coloured text and images in another pdf with only black&white, in order to reduce its dimensions. Moreover, I would like to keep the text as text, without ...
3
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4answers
5k views

How to rotate all images in a directory with imagemagic?

I want to rotate all the images in a directory that match a pattern. So far I have: for file in `ls /tmp/p/DSC*.JPG`; do convert $file -rotate 90 file+'_rotated'.JPG done but that gives no ...
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1answer
1k views

How to create ico file with more then one image

I can use imagemagic to convert png to ico but (I think, not sure) it will create one image ico file for the size I specify. convert favicon.png --resize 32 favicon.ico And ico file can contain 2 ...
2
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2answers
670 views

Remove nth frames of a gif (remove a frame every n frames)

I've recorded a .gif of the screen with ffmpeg. I've used gifsicle and imagemagick to compress it a bit, but it's still to big. My intent is making it small by removing, say, a frame every 2 frames, ...
0
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1answer
288 views

How can I create my own imagemagick binary releases?

I'm looking for a way to build ImageMagick binary distributions for deploying my app. I only need it for Kinux 64-bit (Ubuntu/Debian) and OSX. Actually building it is fine, but I have no idea how to ...
3
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1answer
1k views

imagemagick's convert unexpectedly changing the background color

what I'm trying to achieve is to pull a simple graphic from a webserver and use imagemagick to change a few colors so that I can then further use this image. This is the imagemagick portion: convert ...
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1answer
472 views

Imagemagick convert incorrectly sizes landscape pdfs

When I run convert example.pdf example.png I get a png image, but the image in the pdf is off-center and too small. How do I convert so that the png image is the right size and takes the whole ...
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1answer
3k views

Imagemagick used to generate PPM's in Linux, PPM's are unreadable

I need to generate PPM's as raw data sources for one program. I have a bunch of png's as Input, which I'm going to convert ppm's. When I try a tool like mogrify it generates files, but these are ...
1
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1answer
229 views

imagemagick display: different text in font preview

The awesome display command from imagemagick allows me to preview fonts: display ~/.fonts/font.ttf However, the text is always the same ('That which does not destroy me, only makes me stronger'). ...
7
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4answers
5k views

Command line convert webp to jpg?

I'm using ubuntu 12.04. I've installed libwebp2 & libwebp-dev So far, no example found on the net of converting webp to jpg. Some webp files can easily converted by using imagemagick with ...
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3answers
976 views

Howto recursively create PDF thumnbails on linux command line

I am able to use ImageMagick to create a thumbnail of the first page of a PDF using: convert -thumbnail x80 95.pdf[0] thumb_95.png This works fine and generates a thumb_95.png file. I have tried ...
0
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1answer
391 views

ImageMagick to detect numbers

I was curious to know if ImageMagick can detect numbers in an image? What is the best way to code for this if it can be done? If ImageMagick cannot do it is there another way to detect numbers on an ...
6
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1answer
750 views

Omitting extension with find?

I need to create thumbnails from multiple .png files and would like to do this using ImageMagicks convert utility. To recursively find all files that are not thumbnails themselves, I am using the ...
1
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2answers
858 views

raspberry pi keeps killing imagemagicks convert

My raspberry Pi keeps killing imagemagick's convert command when I'm resizing images, especially larger images. Is there any way I can prevent this?
5
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2answers
223 views

Imagemagick resize

I am familiar with convert -resize % for decreasing a size by percentage but what is the command to increase an image from say 700 pixels to 800 pixels? Horizontal width should resize, too. I need ...
1
vote
1answer
488 views

imagemagick globbing multiple extensions

I have a folder containing photos coming from different cameras. I use Imagemagick to convert to resized and renamed photos in another folder. Something like this: convert "*.jpg" \ -resize 640 ...
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0answers
164 views

Gigapixel Panorama not loading after converted with imagemagick

I made a 3GB tif panorama, but as 3GB is a too big size to open in a computer with a 3Gb RAM, i converted it to JPG convert input.tif output.jpg The result was a 15Mb(?!?) JPG, which i am unable ...
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1answer
159 views

Define length and scale picture

Is there any program under linux where I can do the following: Suppose I have for example a scan of a drawing on a squared paper and suppose that the squares of the original paper have any distance ...
4
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1answer
664 views

how to center vertically tiled watermark

I use imagemagick to add a watermark to my photos. The command line is the following: composite -tile -gravity center watermark.png somefile.jpg somefile.jpg But the watermark isn’t centered ...
4
votes
5answers
3k views

convert single-page landscape pdf into rescaled double-page portrait pdf

I'm having trouble using convert to do the following: I have a bunch of single-page pdf files whose geometry corresponds to a landscape A4 sheet. The actual content is visually split in 2 pages. ...
1
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2answers
897 views

How to mount a .jpg centered into a .pdf (using defined page size and borders)?

I'm looking to convert a .jpg into a .pdf, so that the .jpg is positioned at a certain location: centered on (say) an A4 page, with a minimum border of 30 pixels all around between image and page ...
7
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4answers
942 views

Iterate over n files?

I've got something fairly simple I want to do. I want to use montage on a directory that contains thousands of images, with very few options, namely: me@home$ montage -size 256x256 DSC01*.JPG.svg ...
21
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5answers
33k views

How can I convert a PNG to a PDF in high quality so it's not blurry or fuzzy?

There are a lot of questions out there about how to convert a PDF file to a PNG image, but I'm looking to take a nice sharp PNG file and just basically wrap it or embed it in a PDF file without having ...
4
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2answers
874 views

Running two animations side-by-side using ImageMagick

I have two animations (.gif files) I want to run side-by-side. Can this be done with ImageMagick? Moreover, I want to start one of the gifs after thirty frames of the other have passed. Can this be ...
5
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1answer
4k views

Use imagemagick to convert opaque color to alpha

I have an image with a black background with white elements in the foreground. The image has smoothing, so there are 'in-between' pixels that aren't strictly black or white. I'd like to make the ...
3
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0answers
918 views

Generating a slideshow under linux

Under Windows, one is able to generate a nice slideshow (crossfading between images, applying the Ken Burns effect on each image) on Windows using (Windows) Movie Maker. When I create a slideshow ...
7
votes
2answers
4k views

How can I add invisible watermark to images on commandline?

Similar question here but for Tex -document. Imagemagick shows ways of watermarking here but not how to do it as invisible as possible. I currently just obfuscate some functional elements into photos ...
2
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0answers
1k views

Using Image Magick Convert to Change Channel Depth?

I want to change an image depth of bitmap for testing purposes. Right now I am trying to get a 2 bit palette image, and a 4444 Hicolor image. I have a true color bitmap. I used the below command ...
25
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9answers
47k views

Converting multiple image files from JPEG to PDF format

I want to convert some files from jpeg to pdf. I am using following command. $ convert image1.jpg image1.pdf But I have 100 images. How should I convert all of them to corresponding pdfs? I ...
2
votes
2answers
1k views

Convert a lot of .tif files using imagemagick's mogrify command

I have a lot of tif images in a directory. So I try to convert them into jpg format. I use this command : mogrify -format jpg *.tif But I get an error... an error for each image in fact: mogrify: ...
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0answers
327 views

'convert' taking a long time to create a PNG thumbnail

I made a png from a pdf using ghostscript. It was converted very fast (not more than 1 sec), and has good quality. $ identify 1.png 1.png PNG 3508x2480 3508x2480+0+0 8-bit PseudoClass 2c 51KB 0.000u ...
4
votes
1answer
2k views

convert pdf to image [jpeg|png]

I need to convert pdf files into image files (like: png (prefer), jpeg). I used convert (from the ImageMagick package) but it takes more than 4 seconds for a 2 page pdf file with only tables ...
4
votes
1answer
759 views

Resize a very tiny xcf image without blurring or dithering it

I have some drawings I made with an Intuos tablet. All of these drawings are 25x35 or so. The color of each pixel was very carefully selected. They're kind of like 'miniatures.' I need to resize ...
20
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5answers
29k views

Creating a GIF animation from PNG files

Is there a tool to create a gif animation from a set of png files? I tried the convert command from the ImageMagick suite, but this doesn't always succeed. Also, I have several issues with this: I ...
2
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1answer
2k views

Convert pdf to jpg keeping the same name; resize & create thumbs then rename?

I have a lot of pdf files (3308) on which I must apply four steps: 1) I have to convert all to jpg I found this little script on the web with ImageMagick: batch converting pdf to jpg I want to do ...
11
votes
1answer
1k views

How to generate a lot of (blank) images files?

For a test, I need to quickly create 1700 jpg-images (even blank) in a defined size 1000x706. I wonder if we could do this with a shell script or a program (like ImageMagick). I wish they called ...
5
votes
4answers
1k views

terminal transparency, Imagemagick, and X11 root window problem

In Ubuntu Natty and in Fedora 12, I have urxvt (with 256 colours), and use ImageMagick (display -window root [...]) to set the root window to a picture. When I use the transparency (-tr) option on ...
3
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1answer
2k views

How can I use imagemagick's identify command in a script to tell if a JPEG file is invalid or corrupt?

I have a somewhat-kludgey script in which I want to copy valid, complete JPEG files to a photo album directory. I thought I could use ImageMagick's identify command to do this. The web documentation ...
23
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5answers
23k views

convert images to pdf: How to make PDF Pages same size

I did something like convert -page A4 -compress A4 *.png CH00.pdf But the 1st page is much larger than the subsequent pages. This happens even though the image dimensions are similar. These images ...
3
votes
3answers
1k views

ZSH: Stripping path, filename and extension from a list of files for piping a command

The syntax for the command convert in ImageMagick is convert source_filename.ext1 destination_filename.ext2 I would like to use zsh to feed it with files in a folder path_to_source and output the ...
15
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6answers
30k views

How to convert TXT to PDF?

I want to convert .txt files to .pdf. I'm using this: ls | while read ONELINE; do convert -density 400 "$ONELINE" "$(echo "$ONELINE" | sed 's/.txt/.pdf/g')"; done But this produces one "error" -- ...
5
votes
1answer
1k views

imagemagick creating one big image by piling up thousand of images of the same width?

I've got a few tens of thousands of images all of 2000 pixel width, and I would like to pile them up in one big image of summed up height and 2000 pixel width. I guess there must be a way to do that ...
3
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1answer
128 views

Colour problem when capturing a png of the top panel of the screen

I want to capture a window as a png from within a bash script, using the window's ID. In this case, the window is the top panel.  Using gnome-screenshot the colours are true, as per this image... ...
4
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2answers
667 views

Extract even-numbered and odd-numbered pages of a PDF into two separate PDFs

I have a PDF that consists of several hundred pages of bilingual text. Since I need to use OCR on each language separately, I want to grab the even and odd pages and make two separate PDFs, using ...
8
votes
2answers
7k views

Use convert to grab a specific page from a PDF file?

I know I have done this before, so I'm sure it's possible, I just forget how to do it. There's a way to tell convert to grab a specific page of a PDF, and I'd like to keep the format of that page as ...
3
votes
1answer
809 views

Imagemagick -quality 85 doesn't work

I run mogrify to compress a JPEG image to 85% quality: $ ls -lah Screenshot.jpg -rw-rw-r--. 1 USER GROUP 440K May 24 12:10 Screenshot.jpg $ mogrify -compress JPEG Screenshot.jpg -quality 85 $ ls ...
4
votes
1answer
2k views

Resizing and croping images to an aspect ratio of 6x4 with width of 1024 pixels

I have a mixed set of images, each one has a slightly different resolution with a slightly different aspect ratio from other images. I have tried using commands like convert -resize and convert ...
12
votes
4answers
23k views

pdf to jpg without quality loss; gscan2pdf

When I convert a pdf file to bunch of jpg files using convert -quality 100 file.pdf page_%04d.jpg I have appreciable quality loss. However if I do the following, there is no (noticeable) quality ...
3
votes
2answers
682 views

Oneliner for slicing an image?

I'm looking for a oneliner command that would slice an image into given proportions. Say input would be filename and slice dimensions. Are there any standard command-line tools for this? I tried ...