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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How to convert a directory of JPGs to multi PDF files?

I'm searching for a batch command that will convert a directory of JPGs to many PDF files. In order to convert JPGs to JPGs, i use the following command: mkdir tmp; find . -name "*.jpg" -exec convert ...
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What causes import command to fail as running through a service

Our System V service runs a daemon that runs the import command. Running our service by sudo service myservice start seems to start the service but when it comes to take a screenshot, import does not ...
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194 views

How to apply clut (Color Lookup Table) using ImageMagick command line

IamgeMagick dcouments its -clut option as "Replace the channel values in the first image using each corresponding channel in the second image as a color lookup table...This operator is especially ...
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267 views

ImageMagick delegate library error

I have recently installed ImageMagick and I am trying to use it to convert postscript files to .gif images. I ran the post installation test: '/usr/local/bin/convert logo: logo.gif' This ...
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201 views

Transfer transparency from one image to another using imagemagick

I am trying to take the alpha channel from one image and apply it to another. In this particular case I want to "fix" the corners on the pink one. I want to use the alpha channel from the black one. ...
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152 views

How to obtain a version of ImageMagick compiled for OpenCL (Linux)

For reasons I do not understand, ImageMagick requires a special compilation to make use of OpenCL drivers on the host machine. Does anyone know of a place where I can obtain a Linux version compiled ...
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416 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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656 views

Imagemagick killing colour quality when resizing image

I'm trying to resize a bunch (450+) of images through imagemagick, they all start at 500x500 and I've written a script to resize them to about 5 different sizes. Now I've converted them I notice that ...
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38 views

ImageMagick: is there a way to get the same PNG from the same image on multiple platforms?

I have a script for converting game assets to multiple resolutions, via imagick, and when I run the same imagick commands on Mac and Windows (with the same version of imagick - ImageMagick 6.8.7-2), ...
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58 views

Imagick jpeg:size option not working on one server but not the other

Not sure if this should be posted here or on stackoverflow so figured this was the safer bet. I'm using Imagick to resize jpegs. This is part of the code $prehintSize = (int) $requestedWidth > ...
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241 views

How to display a picture and print pixel coordinates when I click?

When using ImageMagick or similar command line tools it can be useful to know coordinates of some points in the image. How to display an image (with panning and zooming) and print coordinates of ...
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312 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 ...
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153 views

Best settings to convert massive pdf hiking maps to images using ghostscript/imagemagick

I did convert all of the Te Araroa Hiking Maps from PDFs to JPEGs so far. The original maps are 16-64MB PDFs, which take forever to load on my Android Phone. I converted them using Ghostscript and ...
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1answer
89 views

unable to rasterize svg with mask

This svg loads in fine in a browser (ffox, chrome, http://jsfiddle.net/9tT6T/), but inkscape and imagemagick just convert this as a white rectangle when exported as a png. How do I rasterize this svg ...
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240 views

Does imagemagick support image scaling algorithms related to depixelization

I am currently using this plugin for Paint.NET that provides a number of image filtering functionality. http://forums.getpaint.net/index.php?/topic/23601-2d-image-scaling-algorithms/ I was looking at ...
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310 views

Use GIMP color curve with ImageMagick

I created a color curve with GIMP. It looks like this: ~/.gimp2.8/curves/selphy (Just the first lines) # GIMP curves tool settings (time 0) (channel value) (curve (curve-type smooth) ...
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400 views

Windows command line ImageMagick percent escapes

I'm trying to use ImageMagick from the command line in Windows 7 to convert many images at once. I would like to use the -set option interface, but I'm getting unexpected results. A short example of ...
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225 views

Using imagemagick or gifsicle to output GIF with specific filesize?

I have been following this online guide to convert a small video clip into image frames, then combine them together into a single animated GIF. The problem I'm having is that each GIF tends to be ...
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96 views

Converting images of different dimensions into a gif with maximum dimensions

I have a set of images for an animation, but not all of the dimensions are the same. Some may be 100x100, others might be 99x105, a few with 110x100, and so on. If I did a simple convert *.png ...
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214 views

ImageMagick failed to convert colors in PDF

I have got a PDF document containing a red font which I want to replace by a black font. I tried the following command according to this answer: convert -density 300 doc.pdf -fill black -opaque ...
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70 views

Gif output not as smooth when selecting a sequence of files individually

I have a sequence of images 001.png 002.png 003.png that I would like to combine into an animation. I used the following command convert -dispose 3 -loop 0 *.png out.gif And it looks ok. However, ...
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250 views

Normalise levels, contrast, brightness of an image sequence

When making animated gifs or short stop-motion videos from an image sequence, I want them to have all similar levels so that the output looks smooth. It does not have to be a professional quality ...
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3k views

How to auto-trim scanned images using imagemagick or graphicsmagick?

I've got some scanned images in *.jpg format. They are scanned using A4 scanner, in greyscale or colour. Scanned pages have very different dimensions - some A5, some A6, some business cards etc. ...
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228 views

Convert image to pdf a5 with not empty areas

I'm using this command mogrify -format pdf -page a5 iguana2.jpg to convert a jpg file into a pdf. The problem is that the result has a white border. I'd like the image to full fill the a5 page ...
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539 views

make directory if it doesn't exist with `mogrify -path` command

I convert images in a directory named foo to bar by like this. $ mkdir bar $ mogrify -path bar -negate foo/*.png Is there option in Imagemagick that create a folder with -path option, if it not ...
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211 views

What is wrong with this attempt to crop an image with ImageMagick's convert utility?

I am trying to make a tool that will, in imitation of responsive design on the web, make iPhone / iPad wallpapers by taking the largest centered crop-to-device-dimensions it can, and programmatically ...
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219 views

Apply opacity mask and annotate watermark with imagemagick

I'm trying to find a way to apply a watermark and opacity mask for an image using imagemagick. How do I do it? Source Result Thank you all for reading.
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1k views

Convert BMP to PNG while preserving alpha channel

I have an image stored in BMP format and would like to convert it to PNG using imagemagick. I looked at the pixels in a hex viewer and noticed that they are stored in 32bpp, so there is an alpha ...
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174 views

Hue/saturation adjustment by ImageMagick

When I scan a old book that is turned yellow, I remove the yellow by using Photoshop like this. open Adjustment -> Hue/Saturation select Yellows and set Lightness to 100 select Reds and set ...
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13k views

Convert PDF to JPG images with ImageMagick - how to 0-pad file names?

I convert a pdf file to jpg images by using ImageMagick like this: convert -density 600 foo.pdf foo.jpg The created jpg images are named foo-1.jpg, foo-10.jpg and so on. Is there way to 0-pad the ...
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604 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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1k views

ImageMagick mogrify does not overwrite original files

I would like to convert image formats. I can use 'convert' command, but it made another image. So I searched and find 'mogrify' command in ImageMagick official page. What I did was mogrify ...
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334 views

Imagick Convert Append 2 pdf pages

I am using the following code to make a single pdf file with multiple pages in one jpg file I am using Imagick library and PHP tcpdf convert -append path1.pdf path2.jpg Now what i need to do is to ...
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89 views

get rid of transparency of selected part of png using imagemagic

I have this png image with transparency http://s18.postimg.org/d2h2m4yl5/flatten_canvas2.png I want to get rid of transparency using imagemagick, but only of the selected part and not the whole ...
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3k views

Can ImageMagick make thumbnails from video?

I'm trying to extract thumbnails from video via ImageMagick. I found some samples from their official site, but it makes GIF, not PNG. I want a solid thumbnail though. Can it create the same output ...
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2k views

ImageMagick Convert: How to produce sharp resized PNG files from SVG files?

I am using this command to generate a sharp 512px wide version of an SVG file that I have: convert -geometry 256 pinterest.svg pinterest.png This is the source file: <?xml version="1.0" ...
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964 views

CentOS 6.3: yum install ImageMagick, identify and convert don't work

I ran "yum install ImageMagick" on our CentOS 6.3 server, which worked fine, but identify -version and convert don't work (-bash: /usr/local/bin/identify: No such file or directory). I originally ...
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616 views

How can I run mogrify, but prefix the filename?

I have 300k+ jpg files in the same directory. Files are like: /covers 0788862281217.jpg 0788863155104.jpg 7888311516341.jpg 7888370920479.jpg 7888497074277.jpg I need to batch resize saving the ...
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173 views

Cutting in half and rearranging pages of tif document

I scanned in a booklet, and now I have a tif file with "pages" composed of two real pages each, in the order 6/7,5/8,4/9,3/10,2/11,1/12. Is there a way (tool, imagemagick command, etc.) to slice each ...
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116 views

Averaging subsets of images with imagemagick, iteratively

I have a hundred images and I want to average them 5 at a time. The imagemagick command for the first 5 is: convert -background transparent %d.jpg[1-5] -average output1.jpg The imagemagick ...
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1answer
809 views

imagemagick image conversion piped in avconv fails

I am trying to write a script that should take all sort of images (format, size...) and create a video with avconv. I've managed to make it work with a series of jpg (all the same size though) and I'm ...
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502 views

Tile animated gifs

Is there some way to use imagemagic / montage to tile looped animated gifs (intermixed with nonanimated ones)? That is, I want to concatenate the animations in space, not in time. I realize that the ...
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1answer
286 views

convert image at command line to console stream

I'm looking for something like ImageMagick's "convert" but that outputs to the console. The obvious answer is "create a temp file and cat that" but I'd prefer not to have to go to the trouble. Are ...
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116 views

Converting PDF to images preserving the vectorial quality

I'm using ImageMagick to convert some PDF to files to PNG images, and I'm experiencing some quality problems because the generated image has very low quality. I played with the density, resample, ...
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2k 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, ...
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5k views

Why is the gif I created so slow?

I am using ImageMagick to turn a collection of pngs into a single gif. I want this gif to loop as quickly as possible. This is approximately the output I expect (courtesy of Wikipedia): This is ...
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1answer
1k views

Unable to execute port when installing ImageMagick

I'm trying to install ImageMagick by using MacPorts. I've successfully installed MacPorts by using their Mountain Lion .pkg file. I open the terminal and run: sudo port install ImageMagick However ...
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227 views

Automatically name output of montage based on input files

I have a folder with images separated into channels: IMAGE_A_R.jpg IMAGE_A_G.jpg IMAGE_A_B.jpg IMAGE_A_RGB.jpg IMAGE_A1_R.jpg IMAGE_A1_G.jpg IMAGE_A1_B.jpg IMAGE_A1_RGB.jpg IMAGE_B_R.jpg ...
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1k views

Use imagemagic to put several JPG on one page

I have a folder full of jpg files. When I use the following command, convert *.jpg assembly.pdf I get a pdf file with one image per page of the pdf. I would like to put 9 images on each page. Is ...
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277 views

transparent gradients with graphicsmagick

I'm trying to create a gradient that goes from transparent to some color. With imageMagick you can do that with (taken from the documentation): convert -size 100x100 gradient:none-firebrick ...