ImageMagick is a set of command line utilities to modify, transform, and convert images. The utilities are available for all major OSes.

learn more… | top users | synonyms

0
votes
0answers
13 views

Why doesn't ImageMagick's convert actually convert my pdf on docker python:3.5 image?

If you do this: $ docker run --rm -it python:3.5 # apt-get update && apt-get install -y imagemagick wget # convert --version Version: ImageMagick 6.8.9-9 Q16 x86_64 2015-01-05 ...
0
votes
1answer
23 views

Batch convert TIFF to PDF and add text

I got a bunch of TIFF files that I am interested to convert to a single multipage PDF file, which should be easily achieved using ImageMagick. However, I'm also interested in adding text to each ...
3
votes
2answers
53 views

Why is PDF with just one image quite bigger than the image?

I would like to embed a scanned document into a PDF document. The source picture is about 300 kB. If I use the convert command, the PDF has a size of 30 MB, and with GIMP, 3 MB. Here the resulting ...
0
votes
1answer
30 views

Why can't ImageMagick read any fonts on my machine?

I'm trying to run montage. montage `ls ?.png` `ls ??.png` -tile 6x3 -geometry 32x32 tile.jpg But I am getting this error regarding fonts. montage: unable to read font `(null)' @ ...
1
vote
0answers
86 views

Codeigniter libMagick Severity: Core Warning [closed]

I am using GoDaddy Linux cPanel hosting and install fresh copy of CodeIgniter. I'm getting the following error on each session. Each session means this message vanish after next refresh. But when I ...
0
votes
0answers
12 views

how to merge two similar image's differences into one image in terminal?

I don't know if this has been done before, can we merge two pictures in terminal. when I say merge I mean merge their differences and keep the common parts and NOT merge them into a bigger size ...
0
votes
1answer
22 views

ImageMagick: How to do limit colors and dither

I am trying to create a GIF Animation from several frames of a video. I want the result to be small by limiting the colors, but without banding. So, in my mind, I thought of reading the files, then ...
1
vote
2answers
6k views

Imagemagick convert returns “no decode delegate for this image format”

I am trying to use this command for ImageMagick: convert "c:\users\****\My Documents\test.png" -transparent white test2.png However, I keep on getting two errors that look like this: ...
1
vote
1answer
24 views

Merge two images with transparency in imagemagick

I have two images without transparency (two photos) and I want to combine these images into one image where first image covers second image. How to scale these images to the same size and merge with ...
0
votes
2answers
1k views

How to pass a list of files to ImageMagick's montage?

I have a large number of tiles, with the following naming convention: A-x-y.jpg where 0<=x<=16 & 0<=y<=14 Now I know that we can use the Montage tool in ImageMagick, to merge ...
0
votes
1answer
42 views

Batch Image auto crop, apply fixed width, and maintain aspect ratio

I'm finding it hard to find a solution to what I'm trying to do. Simply put, the usage of these images is for an online store. The IrfanView batch processing using the autio crop borders basically ...
4
votes
3answers
2k views

Building ImageMagick on OSX Lion and can't link libpng

I am trying to build ImageMagick 6.8.0-5 on OSX Lion with support for libpng. I am just using the standard ./configure make make install procedure. I succeed in compiling when I do not reference ...
0
votes
3answers
204 views

Identify specific PNG format

How can I tell, ideally with an Imagemagick identify command, whether a particular PNG is PNG32, PNG24 or PNG8? The %z or %[depth] gives the sample depth (not the pixel depth), which is always 8 or ...
1
vote
0answers
27 views

Generating a thumbnail reel from a video with image magik and/or ffmpeg

I read a post detailing how you can call ffmpeg from image magik. I want to learn how to: Take a series of screenshots from a video, store them in memory (dont' write all images to disk) at the end ...
0
votes
0answers
11 views

Align baselines of fonts using ImageMagick

Using ImageMagick I would like to create an image with a headline and tagline having a different font and size. It is important that the baselines are aligned. Below is an example of what I mean: ...
1
vote
1answer
3k views

How to install Imagick on Mac OS with XAMPP

I'm having some trouble installing Imagick on a Mac. I have XAMPP installed and when I run sudo pecl install imagick, I get this error: checking ImageMagick MagickWand API configuration program... ...
3
votes
1answer
1k views

GraphicsMagick error reading PNG file

When trying to read a large PNG file, GraphicsMagick command gm convert pallaso1.png pallars-sobira.jpg just displays this error c:\progs\GraphicsMagick\gm convert: Read Exception (PALLASO1.PNG). ...
4
votes
4answers
6k views

Bulk convert PNG-24 to PNG-8 files with best quality

Can anybody recommend a good method of bulk converting a large amount of PNG-24 files to PNG-8 with as little loss of quality as possible and maintaining transparency? I've tried ImageMagick but the ...
5
votes
3answers
7k views

How do I change the canvas size of a PNG with ImageMagick (GraphicsMagick)? (How to pad with transparency?)

Alternatively: How do I take a non-square PNG and "fill out" the "rest" of the image with transparency so that the resulting square image has the original image centered in the square? ULTIMATELY, ...
1
vote
1answer
12 views

ImageMagick montage always chaging from 32 bits to 8 bits

I am trying to create a montage from a series of 32 bit PNG images. However the result always gets reduced down to 8 bits with no transparency. Here's an example of one of the source images: ...
0
votes
0answers
10 views

Helping with pdf border

Thanks for help in Advance, I have pdf and I want to add border in that pdf with white color, i.e left,right,top ,bottom can someone hep me regarding this I am comfortable with ghostscript
4
votes
3answers
6k views

How to convert a photo to a black and white image by ImageMagick?

How can I convert a JPEG photo to black and white (not grayscale) image like output of a FAX scanner, by ImageMagick?
16
votes
6answers
15k views

Square thumbnails with ImageMagick (convert)?

How to create square/cropped thumbnail using ImageMagick ? Cropping like below.
1
vote
1answer
76 views

Imagemagick changes page size when converting from pdf to jpg

I want to convert a pdf to jpg. The page size is not standard. (pdf here: imslp) When I convert the pdf to jpg with convert -density 300 sheet.pdf sheet.jpg, I get this: Converted image. (The ...
0
votes
0answers
49 views

Composite images with ImageMagick convert

I am trying to automatically compose (overlay) two PNG image files. I have a background image and a mostly transparent overlay of the same dimensions. The latter contains text on transparent ...
20
votes
6answers
28k views

How to merge pdf:s using Imagemagick (resolution problem)

When I try to merge two .pdf files using Imagemagick convert pdf1.pdf pdf2.pdf temp.pdf the resulting temp.pdf file seems to have very low resolution. How can I keep the resolution same as in the ...
0
votes
0answers
21 views

ImageMagick resize/extend PDF results in illegible text

I am trying to extend the PDF’s left margin, and was trying to use convert. However, I can’t get it to work properly without losing the text quality; see screenshot below. The text comes out ...
1
vote
1answer
41 views

How to crop north and center with morgify in ImageMagick

Is there a way to crop an image centered horizontally, but not centered vertically? For example, here is how I would want an image cropped: However, using the command mogrify -crop 250x250 -gravity ...
1
vote
1answer
32 views

How to change gif duration with Image Magick?

I have a gif of say 200 frames, and I want to shorten it to only the first 100. How do I do that?
0
votes
0answers
11 views

Per-image settings in motage

I'm trying to create a composite image with imagemagick's montage, where I can specify a per-image -mattecolor. For example: $ montage -mattecolor red \ -label aaa A.jpg \ -label bbb B.jpg I'd ...
3
votes
1answer
771 views

ImageMagick: wrong size when converting PDF to JPG

I want to apply some improvements (change brightness, contrast, etc) to a pdf, to make it more readable, so I chose ImageMagick and pdftk. I used the following command to split the pdf into several ...
2
votes
0answers
48 views

Using imagemagick to crop and combine A4 sized PDFs

I have to make a photocopy of my driving license. I've scanned the front and back sides, and generated a PDF for each side (and a PNG as well just in case). So far, so good. Imagemagick reports: $ ...
0
votes
0answers
27 views

How can I combine images into one image centered vertically in ImageMagick?

I've got images and I would like to merge them into one vertically as show pic. Here is an example of the desired effect: What I get after using a command like this: montage red.png blue.png ...
0
votes
1answer
25 views

How to parse output to see if a string matches?

Challenge: I need to parse the output from imagemagick's "identify" command to detect the presence of a particular string. If it doesn't exist, then I echo the filename to the screen. Background: I ...
1
vote
1answer
301 views

Using `imagemagick convert`, how do I resize an image and convert it to a centred A4 sized pdf while retaining image quality?

When I convert a png-image to pdf, I have been using convert in.png -page A4 out.pdf to get a pdf where the image quality is retained and the image is aligned to the bottom left corner by default. To ...
0
votes
1answer
48 views

Munpack and utf-8 filenames in attachements

i have another UTF-8 problem. I use munpack -C $extrdir $file to automatically extract JPG files from emails that i received with fetchmail. Afterwards I use bash and imagemagick to process images ...
3
votes
2answers
4k views

Getting the predominant colour in an image?

Is it possible to get the predominant colour in an image from the command line? Ideally I'd like it back as hex or RGB. I thought it might be possible to do this with imagemagick's identify command, ...
0
votes
0answers
11 views

How to create new transparent image with text that will have size of text?

For now I am using: convert -size 500x200 xc:transparent -font "myfont.ttf" -pointsize 300 \ -gravity center -draw "text 0,0 'abcdefgh'" png:- > out.png The problem is that I don't now how much ...
3
votes
2answers
616 views

Batch-processing images of documents to look like a fax

Let's say I have a photo or scan of a text document, possibly with some low-contrast watermark background. If it is a photo, in addition to the watermark there will be brightness gradients from the ...
1
vote
1answer
172 views

Updating libpng on Ubuntu

I had a need to run the Ubuntu libpng utility convert, and when I did I got an error message that my version of libpng was out of date and had to be updated. So, I went the usual route of apt-get ...
1
vote
0answers
49 views

Does Image Magick offer a streaming API?

I have a Node.js server (irrelevant) that does image manipulation with ImageMagick. Basically, I can POST an image to the server and it will respond with the transformed image. Right now I’m just ...
1
vote
1answer
63 views

Batch convert 4 PDF pages to one PDF page

I have a PDF with 100 pages. How can I make a new PDF that displays 4 pages on one? I know that I can do it with Chrome by printing the PDF to new PDF and change this in the options. But I want to ...
2
votes
3answers
2k views

How to batch convert multi-page PDF into individual jpg files

I found these posts on converting a PDF to JPG using ImageMagick. However, I have a 12 page PDF I want to convert into 12 separate high quality jpg files. Looking for the least tedious way possible. ...
2
votes
1answer
40 views

Imagemagick convert -append producing incorrect output

I am trying to stitch together a sequence of images. The first few seem to work fine, but after a couple, bad images appear instead of the specified images. Here are the first several images: ...
2
votes
1answer
89 views

Convert binary data to valid image format, using Imagemagick (or other tool) [duplicate]

I have raw binary data in a file. I know that it is "8-BPP monochrome" and I know width and height of image. How could I convert this data to any readable image format?
1
vote
1answer
29 views

Imagemagick's mogrify can't render text

I'm trying a simple mogrify test.png -annotate +100+100 '26082015' on a simple image, and no text is rendered. I also tried: mogrify test.png -font courier -fill black -pointsize 20 -annotate ...
1
vote
1answer
73 views

Operating on wildcard input files and saving output as <input> + suffix

I want to batch process my a list of wildcard input files and then output then to the input filename with a suffix appended. I'm hoping to understand this general case. In particular, I'm running ...
-1
votes
1answer
108 views

$PATH not saving after exporting Imagemagick paths

I am trying to install Imagemagick using the official instructions. I have executed the three export commands: export MAGICK_HOME="$HOME/ImageMagick-6.9.2" export PATH="$MAGICK_HOME/bin:$PATH" ...
1
vote
0answers
70 views

Disk space used by ImageMagick/Ghostscript

I have a 200 MB PDF file input.pdf consisting of scanned images, whose resolution I want to reduce. Under Windows 7 the following command convert -density 200x200 -quality 60 -compress jpeg ...
2
votes
1answer
2k views

Converting from color to true black and white in ImageMagick? [duplicate]

I have seen how to convert a picture from color to grayscale in this Super User question and answer thread. However, grayscale is not black and white. Simply put, if a field has color, I want to ...