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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11
votes
1answer
609 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
3answers
881 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 ...
2
votes
1answer
1k 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 ...
11
votes
3answers
8k 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 ...
2
votes
2answers
710 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 ...
7
votes
6answers
14k 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
924 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
votes
1answer
110 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... ...
2
votes
1answer
424 views

Use convert or ghostscript to grab the odd-numbered pages of a PDF

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 ...
3
votes
2answers
3k 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 ...
2
votes
1answer
574 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 ...
7
votes
4answers
10k 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
554 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 ...
9
votes
3answers
2k views

remove extra tilespace from a montage (ImageMagick) composite image?

I have a bunch of photos. They're all the same height, and I'm trying to put them together into a composite image using ImageMagick's montage program via Bash. The problem is that by default, the tile ...