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

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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: ...
101
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1answer
70k views

Combine multiple images using ImageMagick

I would like to combine multiple images into one image using ImageMagick. To explain a little better, I want the result to look similar to this: That is, I have a number of screenshots, and I want ...
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1answer
16 views

How do I use ImageMagick convert in a reproducible manner (without timestamps)?

I am trying to use ImageMagick in a script to convert and resize a large number of files for version control. I need the files to convert the same time every time so git won't commit files that just ...
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33 views

Error in converting color pdf into grayscale pdf in Linux - 'File has errors…'

I have been trying to convert a color pdf to a grayscale pdf prior to printing to avoid the color printing costs. I am using Debian and ImageMagick commands: convert -monochrome swp574.pdf ...
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1answer
40 views

How can I convert an animation in PowerPoint into an animated GIF?

In Microsoft PowerPoint 2013, I have a single slide containing a fairly complex animation. I would like to convert this animation to an animated GIF file. I have tried saving the animation directly ...
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2answers
129 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 ...
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1answer
345 views

Can't Start Apache on on Snow Leopard. “libphp5.so requires version 13.0.0 or later, but libjpeg.8.dylib provides version 9.0.0”

To cut a long story short, I was trying to compile and get ImageMagick working on my Mac running Snow Leopard. One thing led to another and now I am stuck with the following error message when I try ...
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1answer
32 views

After cropping tiff its size increases almost two times

I have a tiff file 2544x3472 and its size is 402960 bytes. After that I cropped it using ImageMagick (Ubuntu): convert "$path" -crop 2544x1850+0x0 -compress JPEG "${PWD}"/output/$filename and now ...
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15 views

Batch appending (set side by side horizontally) entire folder of images in pairs using imagemagick

I'm trying to figure out the correct command(s) to batch append (and output with a sequentially numbered (incremented) filename) an entire folder of PNG files, in pairs. i.e. I have a folder of ...
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1answer
851 views

ImageMagick for Windows not listing OpenCL as enabled

I'm trying to experiment with GPU-accelerated resize operations using ImageMagick. On my Windows machine, using convert -list configure lists only FEATURES OpenMP and not the OpenCL I expected since ...
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41 views

Image Magick: Error on convert

I'm trying to use Image Magick to convert a pdf to a png (as I have done many times before), except that today, I type in the same old command as always: convert filename.pdf filename.png I get the ...
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2answers
52 views

How do I separate a TIFF stack into several PNGs or a single PDF?

I was at the library scanning pages of old newspaper articles and the microfilm scanner generated a TIFF stack. Now I am back home I thought this was going to be easier but nothing sees past frame ...
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1answer
148 views

ImageMagick percentage escapes in Windows 10

I run the following in Windows 10 command line; convert file.png %t-test.png convert file.png '%t-test.png' And I get the following files; %t-test.png '%t-test.png' How can I have the expected ...
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0answers
39 views

Imagemagic and php exec: convert: no images defined

The command works just fine from the shell /opt/ImageMagick/bin/convert /private/var/folders/nl/9cky1krj5_j7zwm34tfkndd40000gn/T/pdfPyflQF ...
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1answer
64 views

“convert.im6: memory allocation failed `a.svg'”, trying to convert a 691 KB SVG file to EPS with 100 GB of RAM

I tried to convert a 691 KB SVG file into EPS with ImageMagick using the command convert a.svg a.eps, but I get a memory allocation failed error message: ubuntu@server:~$ convert a.svg a.eps ...
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1answer
4k views

Appending images vertically in ImageMagick

convert -append 1.jpg 2.jpg out.jpg This command appends 1.jpg and 2.jpg horizontally. What is the command to do this vertically?
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5answers
5k views

Get the number of tiffs in a multi-tiff with command line ImageMagick?

Is there a way to get the number of tiffs in a multi-tiff with a command line utility in ImageMagick? What I want to to is to extract (split) the multi-tiff into single files. However if the tiff ...
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0answers
14 views

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

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 ...
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1answer
31 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 ...
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2answers
59 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 ...
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1answer
68 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)' @ ...
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205 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 ...
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0answers
20 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 ...
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1answer
63 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 ...
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1answer
57 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 ...
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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 ...
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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 ...
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3answers
220 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 ...
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0answers
46 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 ...
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14 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: ...
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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... ...
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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). ...
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4answers
7k 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 ...
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3answers
8k 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, ...
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1answer
18 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: ...
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11 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
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3answers
7k 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?
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6answers
16k views

Square thumbnails with ImageMagick (convert)?

How to create square/cropped thumbnail using ImageMagick ? Cropping like below.
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1answer
147 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 ...
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83 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 ...
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6answers
30k 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 ...
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0answers
35 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 ...
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1answer
76 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 ...
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1answer
62 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?
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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 ...
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1answer
909 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 ...
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0answers
79 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: $ ...
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31 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 ...
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1answer
39 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 ...
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1answer
554 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 ...