Use this tag for questions related to the changing/combining of files containing pictures or other images. (Dumps of filesystems are often called images, but handling those is not called image-manipulation)

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37 views

pdftoppm (v 3.0) very slow to convert thumbnail in newer version

On one of our local servers, I use pdftoppm (v 0.18.4) to capture the first page of a pdf file as a 1200px wide jpg. It's very quick, and works very well. I'm doing it like so: pdftoppm -f 1 -l 1 -...
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1answer
35 views

Making concentric circles in GIMP

I have a single layer image that is 480px square, which I am created with GIMP (it is blank). How can I make: Three concentric circles (the center being at 240,240 px) with radii 240, 180, and 60. ...
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1answer
165 views

Imagemagick mogrify with shadow geometry

How can I specify the size of a shadow with imagemagick? This command works: montage foo.jpg bar.jpg foobar.jpg -background lightgray -geometry 1031x1642+57+57 -shadow -monitor -tile 3x1 out.png ...
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1answer
14 views

Detect WebP files

I am using Ubuntu and type doesn't seem to work for webp images: bash: type: test.webp: not found How can I discriminate webp images from the command line?
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0answers
19 views

Using a web browser to generate a gallery/slideshow from local files

I'm trying to see how far I can go with using a web browser for various tasks vs. native apps. One of these tasks is selecting a group of local image files and generate a preview/gallery/slideshow in ...
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0answers
25 views

How can I remove the embedded preview in an EPS file without destroying all metadata?

I have several EPS files data exported from Adobe Illustrator, which apparently embeds a TIFF preview so that the EPS file is previewable. This is undesired, because I use these files in XeLaTeX, ...
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0answers
37 views

How to cut a really large raster image into smaller chunks?

I have a large poster as a pdf-file. I need to create a raster image from it (for instance because there seems to be no pdf viewer which allows me to zoom sufficiently to see the contents). So I ...
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0answers
156 views

How can I add a still image inside a video with avconv or opensource software

I would like to add a still image inside a h264 video following an in and out point in time. I would like to use only opensource/free Linux/Debian packages. I tried a lot of things with avconv like ...
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0answers
44 views

Linux display server or program that can route video and/or images between its clients?

The JACK Audio Connection Kit (http://jackaudio.org/) is a really useful tool for working with audio on linux systems. It allows for both audio and MIDI data to be communicated between its clients, ...
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0answers
10 views

Mogrify/imagemagick flatten + trim in 1 command nog working when processing JPG and TIFF

We are processing 500 images tiff and jpg using this command mogrify -path "PATH_TO\DONE" -trim -flatten -define jpeg:extent=500kb -format jpg -resize "1200x1200>" *.* It should open all images, ...
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0answers
64 views

Using mogrify (imagemagick) to batch convert all my files (with params)

we are new to mogrify and I just read all I could find but somehow I am not succeeding to do the following. take a input path and process all files also in subdirectories trim all resize all image, ...
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0answers
28 views

How to create a gamma cross-fade of two pictures using ImageMagick?

I want to make a gamma composite image, as is common with making cross-fades between two video tracks. The composite frames of the cross-fade are made by cross-fading the gamma values of one picture ...
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0answers
17 views

What Linux tool can I use to measure font sizes in a PSD file?

I've tried gimp (clicking the texts with the Text tool), but it doesn't work (adds a new text instead of focusing on the existing one). The font information is already there (I've asked a friend with ...
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0answers
78 views

Resizing image with ImageMagick and Ruby on Rails

I have been trying to use Imagemagick to resize images uploaded by a user as a square. Currently, I am using the ! like so - 640x640! This works fine if the image I feed it is a resolution of ...
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0answers
47 views

imagemagick: compositing images with fractional X/Y offsets

Using a one-line imagemagick command, how can the offset of a destination image be defined in relation to the size of the source image? The following command superimposes two images with absolute ...
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0answers
80 views

How to obtain the same effect as Camscanner default setting using terminal?

As of now, I can't find any linux command line tool to do it (Demonstration of Camscanner). I could do it using GIMP batch edit mode, But I am looking for existing command line tools/utilities. For ...
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0answers
101 views

Metadata preservation when modifying images with ImageMagic

I want to resize, convert or resize + convert images in JPEG, PNG and TIFF in each direction: jpg → tiff, tiff → png, etc. And I want to use -flatten as well. What does ImageMagick do with the ...