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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grab file every x min, and save with continuous number

I have a ip camera which saves pics to my rasperry pi's ftp, than the pi uses imagemagick to overlay some text and saves it as webcam.jpg this happens every x minutes via cron now i want to grab the ...
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Imagemagick: disable OpenCL on Linux

Whenever I use imagemagick commands, I see errors and warnings like the following: $ convert -size 99x99 caption:"t" -border 1x1 t.png convert: clBuildProgram failed. (-11) @ warning/opencl.c/...
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18 views

verifying imagemagick is installed through browser url

we installed imagemagick in our server using pecl install imagick is there any way we can check it is succesfuly installed or not in server ? can we paste any url in browser and check whether it is ...
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34 views

open latest file (jpg) in folder

My IP camera saves a video (.mp4 file) and a picture (.jpg file) every minute to my Pi, which is set up as an FTP server. I want to open the latest picture with ImageMagick every 5 minutes. The ...
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Straightening a curved image in MATLAB

I registered a video of the experiment that I am carrying on - It is an image of a rotating cylinder. However, when I save the image, the cylinder appears a bit skewed as you can see in the image file ...
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23 views

Bash - Removing all but a single number in output of command

I'm working on a script to process all images in which the standard deviation is less than a certain threshold, e.g., if overall SD is less than 50 in x image, do y to x. The command I am using to ...
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14 views

How to find the pixelwise difference between every sequential pair in a directory of images in ImageMagick

I have a directory of 1,000 time lapse images, ordered by their timestamp. I would like to take the pixelwise difference between every two sequential images, and store the resulting 999 images in a ...
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31 views

How can I find invalid images?

I have a directory with sub-directories. In the directories, there are a lot of images, crawled from the web. How do I loop through every file and show those files which are not valid image files? ...
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50 views

Converting png to pdf with imagemagick: how to set the resolution?

I have an image foo.png which is 1240 * 1754 pixels. Using imagemagick on OS X, I convert this to a .pdf and specify the resolution to be 150 dots per inch, so its physical format will be exactly an ...
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21 views

automatically append images in a table with imagemagick

I know this solution to append images in rows and columns. By the way I would like to arrange the images in a square table automatically regardless of their number and without grouping them with the ...
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30 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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41 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 output2....
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75 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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39 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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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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55 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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64 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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54 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 /private/var/folders/nl/9cky1krj5_j7zwm34tfkndd40000gn/T/...
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82 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 convert....
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189 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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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 http://www....
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42 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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65 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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96 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)' @ error/annotate.c/...
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24 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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93 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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74 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
196 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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215 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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60 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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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: I'...
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19 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: http://...
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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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172 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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106 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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41 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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93 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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74 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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95 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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33 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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44 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
116 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 ...
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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 ...
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328 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 ...
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100 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 ...
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244 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?
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36 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 ...
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1answer
61 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: pieces-...
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183 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 ...